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illegal start of expression public void itemStateChanged(ItemEvent e)

This is my code that keeps on having the illegal start of expression error. Have included error messages at the bottom.

Expand|Select|Wrap|Line Numbers
  1. import java.awt.*;
  2. import java.applet.*;
  3. import java.awt.event.*;
  4.  
  5. public class Prog extends Applet implements ItemListener
  6. {
  7.     Label alabel = new Label("MDAS Game Program");
  8.     Label slabel = new Label("Choose the answer");
  9.  
  10.     CheckboxGroup qq = new CheckboxGroup();
  11.  
  12.     Label qlabel = new Label("1.) 60 * 3 / 5 + 4 - 38 = ??");
  13.     Checkbox aone = new Checkbox("A. 2",false,qq);
  14.     Checkbox bone = new Checkbox("B. 3",false,qq);
  15.     Checkbox cone = new Checkbox("C. 4",false,qq);
  16.     Checkbox hone = new Checkbox("",true,qq);
  17.  
  18.     Label wlabel = new Label("2.) 5 * 100 / 5 + 400 - 499 = ?? ");
  19.     Checkbox atwo = new Checkbox("A. 1",false,qq);
  20.     Checkbox btwo = new Checkbox("B. 2",false,qq);
  21.     Checkbox ctwo = new Checkbox("C. 3",false,qq);
  22.     Checkbox htwo = new Checkbox("",true,qq);
  23.  
  24.     Label elabel = new Label("3.) 10 * 5 - 10 / 2 + 3 = ??");
  25.     Checkbox athree = new Checkbox("A. 18",false,qq);
  26.     Checkbox bthree = new Checkbox("B. 19",false,qq);
  27.     Checkbox cthree = new Checkbox("C. 17",false,qq);
  28.     Checkbox hthree = new Checkbox("",true,qq);
  29.  
  30.     Label rlabel = new Label("4.) 50 * 5 / 10 + 300 - 10 = ??");
  31.     Checkbox afour = new Checkbox("A. 315",false,qq);
  32.     Checkbox bfour = new Checkbox("B. 316",false,qq);
  33.     Checkbox cfour = new Checkbox("C. 317",false,qq);
  34.     Checkbox hfour = new Checkbox("",true,qq);
  35.  
  36.     Label tlabel = new Label("5.) 10 * 2 / 10 - 300 + 100 = ??");
  37.     Checkbox afive = new Checkbox("A. -198",false,qq);
  38.     Checkbox bfive = new Checkbox("B. 198",false,qq);
  39.     Checkbox cfive = new Checkbox("C. 199",false,qq);
  40.     Checkbox hfive = new Checkbox("",true,qq);
  41.  
  42.     Label ylabel = new Label("6.) 10 * 5 / 50 + 1 - 2 = ??");
  43.     Checkbox asix = new Checkbox("A. 1",false,qq);
  44.     Checkbox bsix = new Checkbox("B. 0",false,qq);
  45.     Checkbox csix = new Checkbox("C. 2",false,qq);
  46.     Checkbox hsix = new Checkbox("",true,qq);
  47.  
  48.     Label ulabel = new Label("7.) 8 * 3 / 3 + 450 - 400 = ??");
  49.     Checkbox aseven = new Checkbox("A. 59",false,qq);
  50.     Checkbox bseven = new Checkbox("B. 58",false,qq);
  51.     Checkbox cseven = new Checkbox("C. 57",false,qq);
  52.     Checkbox hseven = new Checkbox("",true,qq);
  53.  
  54.     Label ilabel = new Label("8.) 5 + 4 * 30 / 10 - 2 = ??");
  55.     Checkbox aeight = new Checkbox("A. 14",false,qq);
  56.     Checkbox beight = new Checkbox("B. 15",false,qq);
  57.     Checkbox ceight = new Checkbox("C. 16",false,qq);
  58.     Checkbox height = new Checkbox("",true,qq);
  59.  
  60.     Label olabel = new Label("9.) 5 + 100 * 1 - 2 / 100  = ??");
  61.     Checkbox anine = new Checkbox("A. 3",false,qq);
  62.     Checkbox bnine = new Checkbox("B. 4",false,qq);
  63.     Checkbox cnine = new Checkbox("C. 6",false,qq);
  64.     Checkbox hnine = new Checkbox("",true,qq);
  65.  
  66.  
  67.     Label plabel = new Label("10.) 7 * 4 / 2 - 10 + 300 = ??");
  68.     Checkbox aten = new Checkbox("A. 303",false,qq);
  69.     Checkbox bten = new Checkbox("B. 304",false,qq);
  70.     Checkbox cten = new Checkbox("C. 604",false,qq);
  71.     Checkbox hten = new Checkbox("",true,qq);
  72.  
  73.  
  74.     public void init()
  75.     {
  76.         add(alabel);
  77.         add(slabel);
  78.  
  79.         add(qlabel);
  80. add(aone);
  81.     aone.addItemListener(this);
  82. add(bone);
  83.     bone.addItemListener(this);
  84. add(cone);
  85.     cone.addItemListener(this);
  86. add(hone);
  87.     hone.addItemListener(this);
  88.  
  89. add(wlabel);
  90. add(atwo);
  91.     atwo.addItemListener(this);
  92. add(btwo);
  93.     btwo.addItemListener(this);
  94. add(ctwo);
  95.     ctwo.addItemListener(this);
  96. add(htwo);
  97.     htwo.addItemListener(this);
  98.  
  99.     add(elabel);
  100. add(athree);
  101.     athree.addItemListener(this);
  102. add(bthree);
  103.     bthree.addItemListener(this);
  104. add(cthree);
  105.     cthree.addItemListener(this);
  106. add(hthree);
  107.     hthree.addItemListener(this);
  108.  
  109.     add(rlabel);
  110. add(afour);
  111.     afour.addItemListener(this);
  112. add(bfour);
  113.     bfour.addItemListener(this);
  114. add(cfour);
  115.     cfour.addItemListener(this);
  116. add(hfour);
  117.     hfour.addItemListener(this);
  118.  
  119.     add(tlabel);
  120. add(afive);
  121.     afive.addItemListener(this);
  122. add(bfive);
  123.     bfive.addItemListener(this);
  124. add(cfive);
  125.     cfive.addItemListener(this);
  126. add(hfive);
  127.     hfive.addItemListener(this);
  128.  
  129. add(ylabel);
  130. add(asix);
  131.     asix.addItemListener(this);
  132. add(bsix);
  133.     bsix.addItemListener(this);
  134. add(csix);
  135.     csix.addItemListener(this);
  136. add(hsix);
  137.     hsix.addItemListener(this);
  138.  
  139. add(ulabel);
  140. add(aseven);
  141.     aseven.addItemListener(this);
  142. add(bseven);
  143.     bseven.addItemListener(this);
  144. add(cseven);
  145.     cseven.addItemListener(this);
  146. add(hseven);
  147.     hseven.addItemListener(this);
  148.  
  149.     add(ilabel);
  150. add(aeight);
  151.     aeight.addItemListener(this);
  152. add(beight);
  153.     beight.addItemListener(this);
  154. add(ceight);
  155.     ceight.addItemListener(this);
  156. add(height);
  157.     height.addItemListener(this);
  158.  
  159.     add(olabel);
  160. add(anine);
  161.     anine.addItemListener(this);
  162. add(anine);
  163.     bnine.addItemListener(this);
  164. add(cnine);
  165.     cnine.addItemListener(this);
  166. add(hnine);
  167.     hnine.addItemListener(this);
  168.  
  169.     add(plabel);
  170. add(aten);
  171.     aten.addItemListener(this);
  172. add(bten);
  173.     bten.addItemListener(this);
  174. add(cten);
  175.     cten.addItemListener(this);
  176. add(hten);
  177.     hten.addItemListener(this);
  178.  
  179.  
  180.  
  181.  
  182. public void itemStateChanged(ItemEvent e)
  183. {
  184. if (aone.getState()) 
  185. answer1=1;
  186. if (atwo.getState())
  187. answer2=1;
  188. if (athree.getState())
  189. answer3=1;
  190. if (afour.getState())
  191. answer4=1;
  192. if (afive.getState())
  193. answer5=1;
  194. if (bsix.getState())
  195. answer6=1;
  196. if (bseven.getState())
  197. answer7=1;
  198. if (beight.getState())
  199. answer8=1;
  200. if (bnine.getState())
  201. answer9=1;
  202. if (bten.getState())
  203. answer10=1;
  204. totalscore=answer1+answer2+answer3+answer4+answer5+answer6+answer7+answer8+answer9+answer10;
  205. repaint();
  206.  
  207.  
  208. }
  209.  
  210. public void actionPerformed(ActionEvent e)
  211. {
  212. repaint();
  213.  
  214. score.setText("Total score is :" +totalscore);
  215. }
  216.  
  217.     }
  218.  
  219.  
  220.     }
  221.  


These are the errors that pops up when compiled
C:\Users\caburnay\Desktop\Prog.java:182: error: illegal start of expression
public void itemStateChanged(ItemEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:182: error: illegal start of expression
public void itemStateChanged(ItemEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:182: error: ';' expected
public void itemStateChanged(ItemEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:182: error: ';' expected
public void itemStateChanged(ItemEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:210: error: illegal start of expression
public void actionPerformed(ActionEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:210: error: illegal start of expression
public void actionPerformed(ActionEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:210: error: ';' expected
public void actionPerformed(ActionEvent e)
^
C:\Users\caburnay\Desktop\Prog.java:210: error: ';' expected
public void actionPerformed(ActionEvent e)
^
8 errors
Mar 17 '13 #1
16 3199
r035198x
13,262 8TB
You are missing a closing brace for your init method before the line with public void itemStateChanged ...
Mar 18 '13 #2
and here's another error can you help me?

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  1.  
  2.  
  3.     import java.awt.*;
  4.     import java.applet.*;
  5.     import java.awt.event.*;
  6.  
  7.     public class t1 extends Applet implements ItemListener
  8.     {
  9.         Label alabel = new Label("MDAS Game Program");
  10.         Label slabel = new Label("Choose the answer");
  11.  
  12.         CheckboxGroup qq = new CheckboxGroup();
  13.  
  14.         Label qlabel = new Label("1.) 60 * 3 / 5 + 4 - 38 = ??");
  15.         Checkbox aone = new Checkbox("A. 2",false,qq);
  16.         Checkbox bone = new Checkbox("B. 3",false,qq);
  17.         Checkbox cone = new Checkbox("C. 4",false,qq);
  18.         Checkbox hone = new Checkbox("",true,qq);
  19.  
  20.         Label wlabel = new Label("2.) 5 * 100 / 5 + 400 - 499 = ?? ");
  21.         Checkbox atwo = new Checkbox("A. 1",false,qq);
  22.         Checkbox btwo = new Checkbox("B. 2",false,qq);
  23.         Checkbox ctwo = new Checkbox("C. 3",false,qq);
  24.         Checkbox htwo = new Checkbox("",true,qq);
  25.  
  26.         Label elabel = new Label("3.) 10 * 5 - 10 / 2 + 3 = ??");
  27.         Checkbox athree = new Checkbox("A. 18",false,qq);
  28.         Checkbox bthree = new Checkbox("B. 19",false,qq);
  29.         Checkbox cthree = new Checkbox("C. 17",false,qq);
  30.         Checkbox hthree = new Checkbox("",true,qq);
  31.  
  32.         Label rlabel = new Label("4.) 50 * 5 / 10 + 300 - 10 = ??");
  33.         Checkbox afour = new Checkbox("A. 315",false,qq);
  34.         Checkbox bfour = new Checkbox("B. 316",false,qq);
  35.         Checkbox cfour = new Checkbox("C. 317",false,qq);
  36.         Checkbox hfour = new Checkbox("",true,qq);
  37.  
  38.         Label tlabel = new Label("5.) 10 * 2 / 10 - 300 + 100 = ??");
  39.         Checkbox afive = new Checkbox("A. -198",false,qq);
  40.         Checkbox bfive = new Checkbox("B. 198",false,qq);
  41.         Checkbox cfive = new Checkbox("C. 199",false,qq);
  42.         Checkbox hfive = new Checkbox("",true,qq);
  43.  
  44.         Label ylabel = new Label("6.) 10 * 5 / 50 + 1 - 2 = ??");
  45.         Checkbox asix = new Checkbox("A. 1",false,qq);
  46.         Checkbox bsix = new Checkbox("B. 0",false,qq);
  47.         Checkbox csix = new Checkbox("C. 2",false,qq);
  48.         Checkbox hsix = new Checkbox("",true,qq);
  49.  
  50.         Label ulabel = new Label("7.) 8 * 3 / 3 + 450 - 400 = ??");
  51.         Checkbox aseven = new Checkbox("A. 59",false,qq);
  52.         Checkbox bseven = new Checkbox("B. 58",false,qq);
  53.         Checkbox cseven = new Checkbox("C. 57",false,qq);
  54.         Checkbox hseven = new Checkbox("",true,qq);
  55.  
  56.         Label ilabel = new Label("8.) 5 + 4 * 30 / 10 - 2 = ??");
  57.         Checkbox aeight = new Checkbox("A. 14",false,qq);
  58.         Checkbox beight = new Checkbox("B. 15",false,qq);
  59.         Checkbox ceight = new Checkbox("C. 16",false,qq);
  60.         Checkbox height = new Checkbox("",true,qq);
  61.  
  62.         Label olabel = new Label("9.) 5 + 100 * 1 - 2 / 100  = ??");
  63.         Checkbox anine = new Checkbox("A. 3",false,qq);
  64.         Checkbox bnine = new Checkbox("B. 4",false,qq);
  65.         Checkbox cnine = new Checkbox("C. 6",false,qq);
  66.         Checkbox hnine = new Checkbox("",true,qq);
  67.  
  68.  
  69.         Label plabel = new Label("10.) 7 * 4 / 2 - 10 + 300 = ??");
  70.         Checkbox aten = new Checkbox("A. 303",false,qq);
  71.         Checkbox bten = new Checkbox("B. 304",false,qq);
  72.         Checkbox cten = new Checkbox("C. 604",false,qq);
  73.         Checkbox hten = new Checkbox("",true,qq);
  74.  
  75.         Button done = new Button("Done");
  76.  
  77.  
  78.         public void init()
  79.         {
  80.             add(alabel);
  81.             add(slabel);
  82.  
  83.             add(qlabel);
  84.     add(aone);
  85.         aone.addItemListener(this);
  86.     add(bone);
  87.         bone.addItemListener(this);
  88.     add(cone);
  89.         cone.addItemListener(this);
  90.     add(hone);
  91.         hone.addItemListener(this);
  92.  
  93.     add(wlabel);
  94.     add(atwo);
  95.         atwo.addItemListener(this);
  96.     add(btwo);
  97.         btwo.addItemListener(this);
  98.     add(ctwo);
  99.         ctwo.addItemListener(this);
  100.     add(htwo);
  101.         htwo.addItemListener(this);
  102.  
  103.         add(elabel);
  104.     add(athree);
  105.         athree.addItemListener(this);
  106.     add(bthree);
  107.         bthree.addItemListener(this);
  108.     add(cthree);
  109.         cthree.addItemListener(this);
  110.     add(hthree);
  111.         hthree.addItemListener(this);
  112.  
  113.         add(rlabel);
  114.     add(afour);
  115.         afour.addItemListener(this);
  116.     add(bfour);
  117.         bfour.addItemListener(this);
  118.     add(cfour);
  119.         cfour.addItemListener(this);
  120.     add(hfour);
  121.         hfour.addItemListener(this);
  122.  
  123.         add(tlabel);
  124.     add(afive);
  125.         afive.addItemListener(this);
  126.     add(bfive);
  127.         bfive.addItemListener(this);
  128.     add(cfive);
  129.         cfive.addItemListener(this);
  130.     add(hfive);
  131.         hfive.addItemListener(this);
  132.  
  133.     add(ylabel);
  134.     add(asix);
  135.         asix.addItemListener(this);
  136.     add(bsix);
  137.         bsix.addItemListener(this);
  138.     add(csix);
  139.         csix.addItemListener(this);
  140.     add(hsix);
  141.         hsix.addItemListener(this);
  142.  
  143.     add(ulabel);
  144.     add(aseven);
  145.         aseven.addItemListener(this);
  146.     add(bseven);
  147.         bseven.addItemListener(this);
  148.     add(cseven);
  149.         cseven.addItemListener(this);
  150.     add(hseven);
  151.         hseven.addItemListener(this);
  152.  
  153.         add(ilabel);
  154.     add(aeight);
  155.         aeight.addItemListener(this);
  156.     add(beight);
  157.         beight.addItemListener(this);
  158.     add(ceight);
  159.         ceight.addItemListener(this);
  160.     add(height);
  161.         height.addItemListener(this);
  162.  
  163.         add(olabel);
  164.     add(anine);
  165.         anine.addItemListener(this);
  166.     add(anine);
  167.         bnine.addItemListener(this);
  168.     add(cnine);
  169.         cnine.addItemListener(this);
  170.     add(hnine);
  171.         hnine.addItemListener(this);
  172.  
  173.         add(plabel);
  174.     add(aten);
  175.         aten.addItemListener(this);
  176.     add(bten);
  177.         bten.addItemListener(this);
  178.     add(cten);
  179.         cten.addItemListener(this);
  180.     add(hten);
  181.         hten.addItemListener(this);
  182.  
  183.     add(done);
  184.         done.addActionListener(this);
  185.  
  186.         }
  187.  
  188.  
  189.     public void itemStateChanged(ItemEvent e)
  190.     {
  191.  
  192.         int answer1, answer2, answer3, answer4, answer5, answer6, answer7, answer8, answer9, answer10;
  193.         int totalscore;
  194.         totalscore = 0;
  195.  
  196.     if (aone.getState()) 
  197.     answer1=1;
  198.     if (atwo.getState())
  199.     answer2=1;
  200.     if (athree.getState())
  201.     answer3=1;
  202.     if (afour.getState())
  203.     answer4=1;
  204.     if (afive.getState())
  205.     answer5=1;
  206.     if (bsix.getState())
  207.     answer6=1;
  208.     if (bseven.getState())
  209.     answer7=1;
  210.     if (beight.getState())
  211.     answer8=1;
  212.     if (bnine.getState())
  213.     answer9=1;
  214.     if (bten.getState())
  215.     answer10=1;
  216.     totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
  217.     repaint();
  218.  
  219.  
  220.     }
  221.  
  222.     public void actionPerformed(ActionEvent e)
  223.     {
  224.     repaint();
  225.  
  226.  
  227.  
  228.     if ("done".equals(e.getActionCommand())) 
  229.         {
  230.  
  231.          done.setText("Total score is :" + totalscore);
  232.  
  233.            }
  234.  
  235.     }
  236.  
  237.         }
  238.  
  239.  
  240.  
  241.  
  242.  
  243.  
and the error is

--------------------Configuration: <Default>--------------------
C:\Users\caburnay\Desktop\t1.java:184: error: method addActionListener in class Button cannot be applied to given types;
done.addActionListener(this);
^
required: ActionListener
found: t1
reason: actual argument t1 cannot be converted to ActionListener by method invocation conversion
C:\Users\caburnay\Desktop\t1.java:231: error: cannot find symbol
done.setText("Total score is :" + totalscore);
^
symbol: variable totalscore
location: class t1
2 errors

Process completed.
Mar 18 '13 #3
r035198x
13,262 8TB
Try to deduce the problem from the error message given.
e.g It says method "addActionListener in class Button cannot be applied to given types" and says later that "t1 cannot be converted to ActionListener". So you are trying to add an action listener but not passing in an action listener because your class t1 is not an action listener.
You can make it an action listener by adding ActionListener to it's implemented interfaces

Expand|Select|Wrap|Line Numbers
  1. public class t1 extends Applet implements ItemListener,ActionListener {
Mar 18 '13 #4
This is the LAST. I dunno how to remove this. XD Thanks for your help. I know you're a good guy! :D


Expand|Select|Wrap|Line Numbers
  1.  
  2.     import java.awt.*;
  3.     import java.applet.*;
  4.     import java.awt.event.*;
  5.  
  6.     public class t1 extends Applet implements ItemListener, ActionListener
  7.     {
  8.         Label alabel = new Label("MDAS Game Program");
  9.         Label slabel = new Label("Choose the answer");
  10.  
  11.         CheckboxGroup qq = new CheckboxGroup();
  12.  
  13.         Label qlabel = new Label("1.) 60 * 3 / 5 + 4 - 38 = ??");
  14.         Checkbox aone = new Checkbox("A. 2",false,qq);
  15.         Checkbox bone = new Checkbox("B. 3",false,qq);
  16.         Checkbox cone = new Checkbox("C. 4",false,qq);
  17.         Checkbox hone = new Checkbox("",true,qq);
  18.  
  19.         Label wlabel = new Label("2.) 5 * 100 / 5 + 400 - 499 = ?? ");
  20.         Checkbox atwo = new Checkbox("A. 1",false,qq);
  21.         Checkbox btwo = new Checkbox("B. 2",false,qq);
  22.         Checkbox ctwo = new Checkbox("C. 3",false,qq);
  23.         Checkbox htwo = new Checkbox("",true,qq);
  24.  
  25.         Label elabel = new Label("3.) 10 * 5 - 10 / 2 + 3 = ??");
  26.         Checkbox athree = new Checkbox("A. 18",false,qq);
  27.         Checkbox bthree = new Checkbox("B. 19",false,qq);
  28.         Checkbox cthree = new Checkbox("C. 17",false,qq);
  29.         Checkbox hthree = new Checkbox("",true,qq);
  30.  
  31.         Label rlabel = new Label("4.) 50 * 5 / 10 + 300 - 10 = ??");
  32.         Checkbox afour = new Checkbox("A. 315",false,qq);
  33.         Checkbox bfour = new Checkbox("B. 316",false,qq);
  34.         Checkbox cfour = new Checkbox("C. 317",false,qq);
  35.         Checkbox hfour = new Checkbox("",true,qq);
  36.  
  37.         Label tlabel = new Label("5.) 10 * 2 / 10 - 300 + 100 = ??");
  38.         Checkbox afive = new Checkbox("A. -198",false,qq);
  39.         Checkbox bfive = new Checkbox("B. 198",false,qq);
  40.         Checkbox cfive = new Checkbox("C. 199",false,qq);
  41.         Checkbox hfive = new Checkbox("",true,qq);
  42.  
  43.         Label ylabel = new Label("6.) 10 * 5 / 50 + 1 - 2 = ??");
  44.         Checkbox asix = new Checkbox("A. 1",false,qq);
  45.         Checkbox bsix = new Checkbox("B. 0",false,qq);
  46.         Checkbox csix = new Checkbox("C. 2",false,qq);
  47.         Checkbox hsix = new Checkbox("",true,qq);
  48.  
  49.         Label ulabel = new Label("7.) 8 * 3 / 3 + 450 - 400 = ??");
  50.         Checkbox aseven = new Checkbox("A. 59",false,qq);
  51.         Checkbox bseven = new Checkbox("B. 58",false,qq);
  52.         Checkbox cseven = new Checkbox("C. 57",false,qq);
  53.         Checkbox hseven = new Checkbox("",true,qq);
  54.  
  55.         Label ilabel = new Label("8.) 5 + 4 * 30 / 10 - 2 = ??");
  56.         Checkbox aeight = new Checkbox("A. 14",false,qq);
  57.         Checkbox beight = new Checkbox("B. 15",false,qq);
  58.         Checkbox ceight = new Checkbox("C. 16",false,qq);
  59.         Checkbox height = new Checkbox("",true,qq);
  60.  
  61.         Label olabel = new Label("9.) 5 + 100 * 1 - 2 / 100  = ??");
  62.         Checkbox anine = new Checkbox("A. 3",false,qq);
  63.         Checkbox bnine = new Checkbox("B. 4",false,qq);
  64.         Checkbox cnine = new Checkbox("C. 6",false,qq);
  65.         Checkbox hnine = new Checkbox("",true,qq);
  66.  
  67.  
  68.         Label plabel = new Label("10.) 7 * 4 / 2 - 10 + 300 = ??");
  69.         Checkbox aten = new Checkbox("A. 303",false,qq);
  70.         Checkbox bten = new Checkbox("B. 304",false,qq);
  71.         Checkbox cten = new Checkbox("C. 604",false,qq);
  72.         Checkbox hten = new Checkbox("",true,qq);
  73.  
  74.         Button done = new Button("Done");
  75.  
  76.  
  77.         public void init()
  78.         {
  79.             add(alabel);
  80.             add(slabel);
  81.  
  82.             add(qlabel);
  83.     add(aone);
  84.         aone.addItemListener(this);
  85.     add(bone);
  86.         bone.addItemListener(this);
  87.     add(cone);
  88.         cone.addItemListener(this);
  89.     add(hone);
  90.         hone.addItemListener(this);
  91.  
  92.     add(wlabel);
  93.     add(atwo);
  94.         atwo.addItemListener(this);
  95.     add(btwo);
  96.         btwo.addItemListener(this);
  97.     add(ctwo);
  98.         ctwo.addItemListener(this);
  99.     add(htwo);
  100.         htwo.addItemListener(this);
  101.  
  102.         add(elabel);
  103.     add(athree);
  104.         athree.addItemListener(this);
  105.     add(bthree);
  106.         bthree.addItemListener(this);
  107.     add(cthree);
  108.         cthree.addItemListener(this);
  109.     add(hthree);
  110.         hthree.addItemListener(this);
  111.  
  112.         add(rlabel);
  113.     add(afour);
  114.         afour.addItemListener(this);
  115.     add(bfour);
  116.         bfour.addItemListener(this);
  117.     add(cfour);
  118.         cfour.addItemListener(this);
  119.     add(hfour);
  120.         hfour.addItemListener(this);
  121.  
  122.         add(tlabel);
  123.     add(afive);
  124.         afive.addItemListener(this);
  125.     add(bfive);
  126.         bfive.addItemListener(this);
  127.     add(cfive);
  128.         cfive.addItemListener(this);
  129.     add(hfive);
  130.         hfive.addItemListener(this);
  131.  
  132.     add(ylabel);
  133.     add(asix);
  134.         asix.addItemListener(this);
  135.     add(bsix);
  136.         bsix.addItemListener(this);
  137.     add(csix);
  138.         csix.addItemListener(this);
  139.     add(hsix);
  140.         hsix.addItemListener(this);
  141.  
  142.     add(ulabel);
  143.     add(aseven);
  144.         aseven.addItemListener(this);
  145.     add(bseven);
  146.         bseven.addItemListener(this);
  147.     add(cseven);
  148.         cseven.addItemListener(this);
  149.     add(hseven);
  150.         hseven.addItemListener(this);
  151.  
  152.         add(ilabel);
  153.     add(aeight);
  154.         aeight.addItemListener(this);
  155.     add(beight);
  156.         beight.addItemListener(this);
  157.     add(ceight);
  158.         ceight.addItemListener(this);
  159.     add(height);
  160.         height.addItemListener(this);
  161.  
  162.         add(olabel);
  163.     add(anine);
  164.         anine.addItemListener(this);
  165.     add(anine);
  166.         bnine.addItemListener(this);
  167.     add(cnine);
  168.         cnine.addItemListener(this);
  169.     add(hnine);
  170.         hnine.addItemListener(this);
  171.  
  172.         add(plabel);
  173.     add(aten);
  174.         aten.addItemListener(this);
  175.     add(bten);
  176.         bten.addItemListener(this);
  177.     add(cten);
  178.         cten.addItemListener(this);
  179.     add(hten);
  180.         hten.addItemListener(this);
  181.  
  182.     add(done);
  183.         done.addActionListener(this);
  184.  
  185.         }
  186.  
  187.  
  188.     public void itemStateChanged(ItemEvent e)
  189.     {
  190.  
  191.         int answer1, answer2, answer3, answer4, answer5, answer6, answer7, answer8, answer9, answer10;
  192.         int totalscore;
  193.  
  194.  
  195.     if (aone.getState()) 
  196.     answer1=1;
  197.     if (atwo.getState())
  198.     answer2=1;
  199.     if (athree.getState())
  200.     answer3=1;
  201.     if (afour.getState())
  202.     answer4=1;
  203.     if (afive.getState())
  204.     answer5=1;
  205.     if (bsix.getState())
  206.     answer6=1;
  207.     if (bseven.getState())
  208.     answer7=1;
  209.     if (beight.getState())
  210.     answer8=1;
  211.     if (bnine.getState())
  212.     answer9=1;
  213.     if (bten.getState())
  214.     answer10=1;
  215.     totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
  216.     repaint();
  217.  
  218.  
  219.     }
  220.  
  221.     public void actionPerformed(ActionEvent e)
  222.     {
  223.     repaint();
  224.  
  225.     int totalscore;
  226.  
  227.     if (done.equals(e.getActionCommand())) 
  228.         {
  229.  
  230.          done.setText("Total score is :" + totalscore);
  231.  
  232.            }
  233.  
  234.     }
  235.  
  236.         }
  237.  
  238.  
  239.  
  240.  
  241.  
THIS IS THE ERROR

C:\Users\caburnay\Desktop\t1.java:231: error: cannot find symbol
done.setText("Total score is :" + totalscore);
^
symbol: method setText(String)
location: variable done of type Button
1 error
Mar 18 '13 #5
r035198x
13,262 8TB
Button doesn't have a setText method. It has a setLabel method.
Mar 18 '13 #6
Expand|Select|Wrap|Line Numbers
  1.  
  2.  
  3.     import java.awt.*;
  4.     import java.applet.*;
  5.     import java.awt.event.*;
  6.  
  7.     public class t1 extends Applet implements ItemListener, ActionListener
  8.     {
  9.         Label alabel = new Label("MDAS Game Program");
  10.         Label slabel = new Label("Choose the answer");
  11.  
  12.         CheckboxGroup qq = new CheckboxGroup();
  13.  
  14.         Label qlabel = new Label("1.) 60 * 3 / 5 + 4 - 38 = ??");
  15.         Checkbox aone = new Checkbox("A. 2",false,qq);
  16.         Checkbox bone = new Checkbox("B. 3",false,qq);
  17.         Checkbox cone = new Checkbox("C. 4",false,qq);
  18.         Checkbox hone = new Checkbox("",true,qq);
  19.  
  20.         Label wlabel = new Label("2.) 5 * 100 / 5 + 400 - 499 = ?? ");
  21.         Checkbox atwo = new Checkbox("A. 1",false,qq);
  22.         Checkbox btwo = new Checkbox("B. 2",false,qq);
  23.         Checkbox ctwo = new Checkbox("C. 3",false,qq);
  24.         Checkbox htwo = new Checkbox("",true,qq);
  25.  
  26.         Label elabel = new Label("3.) 10 * 5 - 10 / 2 + 3 = ??");
  27.         Checkbox athree = new Checkbox("A. 18",false,qq);
  28.         Checkbox bthree = new Checkbox("B. 19",false,qq);
  29.         Checkbox cthree = new Checkbox("C. 17",false,qq);
  30.         Checkbox hthree = new Checkbox("",true,qq);
  31.  
  32.         Label rlabel = new Label("4.) 50 * 5 / 10 + 300 - 10 = ??");
  33.         Checkbox afour = new Checkbox("A. 315",false,qq);
  34.         Checkbox bfour = new Checkbox("B. 316",false,qq);
  35.         Checkbox cfour = new Checkbox("C. 317",false,qq);
  36.         Checkbox hfour = new Checkbox("",true,qq);
  37.  
  38.         Label tlabel = new Label("5.) 10 * 2 / 10 - 300 + 100 = ??");
  39.         Checkbox afive = new Checkbox("A. -198",false,qq);
  40.         Checkbox bfive = new Checkbox("B. 198",false,qq);
  41.         Checkbox cfive = new Checkbox("C. 199",false,qq);
  42.         Checkbox hfive = new Checkbox("",true,qq);
  43.  
  44.         Label ylabel = new Label("6.) 10 * 5 / 50 + 1 - 2 = ??");
  45.         Checkbox asix = new Checkbox("A. 1",false,qq);
  46.         Checkbox bsix = new Checkbox("B. 0",false,qq);
  47.         Checkbox csix = new Checkbox("C. 2",false,qq);
  48.         Checkbox hsix = new Checkbox("",true,qq);
  49.  
  50.         Label ulabel = new Label("7.) 8 * 3 / 3 + 450 - 400 = ??");
  51.         Checkbox aseven = new Checkbox("A. 59",false,qq);
  52.         Checkbox bseven = new Checkbox("B. 58",false,qq);
  53.         Checkbox cseven = new Checkbox("C. 57",false,qq);
  54.         Checkbox hseven = new Checkbox("",true,qq);
  55.  
  56.         Label ilabel = new Label("8.) 5 + 4 * 30 / 10 - 2 = ??");
  57.         Checkbox aeight = new Checkbox("A. 14",false,qq);
  58.         Checkbox beight = new Checkbox("B. 15",false,qq);
  59.         Checkbox ceight = new Checkbox("C. 16",false,qq);
  60.         Checkbox height = new Checkbox("",true,qq);
  61.  
  62.         Label olabel = new Label("9.) 5 + 100 * 1 - 2 / 100  = ??");
  63.         Checkbox anine = new Checkbox("A. 3",false,qq);
  64.         Checkbox bnine = new Checkbox("B. 4",false,qq);
  65.         Checkbox cnine = new Checkbox("C. 6",false,qq);
  66.         Checkbox hnine = new Checkbox("",true,qq);
  67.  
  68.  
  69.         Label plabel = new Label("10.) 7 * 4 / 2 - 10 + 300 = ??");
  70.         Checkbox aten = new Checkbox("A. 303",false,qq);
  71.         Checkbox bten = new Checkbox("B. 304",false,qq);
  72.         Checkbox cten = new Checkbox("C. 604",false,qq);
  73.         Checkbox hten = new Checkbox("",true,qq);
  74.  
  75.         Button done = new Button("Done");
  76.  
  77.  
  78.         public void init()
  79.         {
  80.             add(alabel);
  81.             add(slabel);
  82.  
  83.             add(qlabel);
  84.     add(aone);
  85.         aone.addItemListener(this);
  86.     add(bone);
  87.         bone.addItemListener(this);
  88.     add(cone);
  89.         cone.addItemListener(this);
  90.     add(hone);
  91.         hone.addItemListener(this);
  92.  
  93.     add(wlabel);
  94.     add(atwo);
  95.         atwo.addItemListener(this);
  96.     add(btwo);
  97.         btwo.addItemListener(this);
  98.     add(ctwo);
  99.         ctwo.addItemListener(this);
  100.     add(htwo);
  101.         htwo.addItemListener(this);
  102.  
  103.         add(elabel);
  104.     add(athree);
  105.         athree.addItemListener(this);
  106.     add(bthree);
  107.         bthree.addItemListener(this);
  108.     add(cthree);
  109.         cthree.addItemListener(this);
  110.     add(hthree);
  111.         hthree.addItemListener(this);
  112.  
  113.         add(rlabel);
  114.     add(afour);
  115.         afour.addItemListener(this);
  116.     add(bfour);
  117.         bfour.addItemListener(this);
  118.     add(cfour);
  119.         cfour.addItemListener(this);
  120.     add(hfour);
  121.         hfour.addItemListener(this);
  122.  
  123.         add(tlabel);
  124.     add(afive);
  125.         afive.addItemListener(this);
  126.     add(bfive);
  127.         bfive.addItemListener(this);
  128.     add(cfive);
  129.         cfive.addItemListener(this);
  130.     add(hfive);
  131.         hfive.addItemListener(this);
  132.  
  133.     add(ylabel);
  134.     add(asix);
  135.         asix.addItemListener(this);
  136.     add(bsix);
  137.         bsix.addItemListener(this);
  138.     add(csix);
  139.         csix.addItemListener(this);
  140.     add(hsix);
  141.         hsix.addItemListener(this);
  142.  
  143.     add(ulabel);
  144.     add(aseven);
  145.         aseven.addItemListener(this);
  146.     add(bseven);
  147.         bseven.addItemListener(this);
  148.     add(cseven);
  149.         cseven.addItemListener(this);
  150.     add(hseven);
  151.         hseven.addItemListener(this);
  152.  
  153.         add(ilabel);
  154.     add(aeight);
  155.         aeight.addItemListener(this);
  156.     add(beight);
  157.         beight.addItemListener(this);
  158.     add(ceight);
  159.         ceight.addItemListener(this);
  160.     add(height);
  161.         height.addItemListener(this);
  162.  
  163.         add(olabel);
  164.     add(anine);
  165.         anine.addItemListener(this);
  166.     add(anine);
  167.         bnine.addItemListener(this);
  168.     add(cnine);
  169.         cnine.addItemListener(this);
  170.     add(hnine);
  171.         hnine.addItemListener(this);
  172.  
  173.         add(plabel);
  174.     add(aten);
  175.         aten.addItemListener(this);
  176.     add(bten);
  177.         bten.addItemListener(this);
  178.     add(cten);
  179.         cten.addItemListener(this);
  180.     add(hten);
  181.         hten.addItemListener(this);
  182.  
  183.     add(done);
  184.         done.addActionListener(this);
  185.  
  186.         }
  187.  
  188.  
  189.     public void itemStateChanged(ItemEvent e)
  190.     {
  191.  
  192.     int answer1, answer2, answer3, answer4, answer5, answer6, answer7, answer8, answer9, answer10, totalscore;
  193.  
  194.  
  195.  
  196.     if (aone.getState()) 
  197.     answer1=1;
  198.     if (atwo.getState())
  199.     answer2=1;
  200.     if (athree.getState())
  201.     answer3=1;
  202.     if (afour.getState())
  203.     answer4=1;
  204.     if (afive.getState())
  205.     answer5=1;
  206.     if (bsix.getState())
  207.     answer6=1;
  208.     if (bseven.getState())
  209.     answer7=1;
  210.     if (beight.getState())
  211.     answer8=1;
  212.     if (bnine.getState())
  213.     answer9=1;
  214.     if (bten.getState())
  215.     answer10=1;
  216.     totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
  217.     repaint();
  218.  
  219.  
  220.     }
  221.  
  222.     public void actionPerformed(ActionEvent e)
  223.     {
  224.     repaint();
  225.  
  226.  
  227.  
  228.  
  229.     if (done.equals(e.getActionCommand())) 
  230.         {
  231.  
  232.          done.setLabel("Total score is: " + totalscore);
  233.            }
  234.  
  235.     }
  236.  
  237.         }
  238.  
  239.  
  240.  
  241.  
  242.  
--------------------Configuration: <Default>--------------------
C:\Users\caburnay\Desktop\t1.java:232: error: cannot find symbol
done.setLabel("Total score is: " + totalscore);
^
symbol: variable totalscore
location: class t1
1 error

Process completed.

and IF I PUT "int totalscore;"
it gets 11 errors

--------------------Configuration: <Default>--------------------
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer1 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer2 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer3 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer4 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer5 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer6 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer7 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer8 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer9 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:216: error: variable answer10 might not have been initialized
totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
^
C:\Users\caburnay\Desktop\t1.java:232: error: variable totalscore might not have been initialized
done.setLabel("Total score is: " + totalscore);
^
11 errors

Process completed.
Mar 18 '13 #7
r035198x
13,262 8TB
So initialize all those variables that may not have been intialized.
Mar 18 '13 #8
i have declared it all at (nothing happened)


Expand|Select|Wrap|Line Numbers
  1. public void itemStateChanged(ItemEvent e)
  2.     {
  3.  
  4.     int answer1, answer2, answer3, answer4, answer5, answer6, answer7, answer8, answer9, answer10, totalscore;
  5.  
Mar 18 '13 #9
r035198x
13,262 8TB
declaring is not the same as initializing.

declaring is
Expand|Select|Wrap|Line Numbers
  1. int answer1;
initializing is
Expand|Select|Wrap|Line Numbers
  1. int answer1 = 0;
Mar 18 '13 #10
how to put spaces between numbers?

for example

1.) 2 + 23+25+ 5+
a. 23 b. 23 c. 1

2.) 2- 4- 4- 2
a. 20 b. 19 c. 10

Expand|Select|Wrap|Line Numbers
  1.  
  2.     import java.awt.*;
  3.     import java.applet.*;
  4.     import java.awt.event.*;
  5.  
  6.     public class t1 extends Applet implements ItemListener, ActionListener
  7.     {
  8.         Label alabel = new Label("MDAS Game Program");
  9.         Label slabel = new Label("Choose the answer");
  10.  
  11.         CheckboxGroup qq = new CheckboxGroup();
  12.  
  13.         Label qlabel = new Label("1.) 60 * 3 / 5 + 4 - 38 = ??");
  14.         Checkbox aone = new Checkbox("A. 2",false,qq);
  15.         Checkbox bone = new Checkbox("B. 3",false,qq);
  16.         Checkbox cone = new Checkbox("C. 4",false,qq);
  17.         Checkbox hone = new Checkbox("",true,qq);
  18.  
  19.         CheckboxGroup ww = new CheckboxGroup();
  20.  
  21.         Label wlabel = new Label("2.) 5 * 100 / 5 + 400 - 499 = ?? ");
  22.         Checkbox atwo = new Checkbox("A. 1",false,qq);
  23.         Checkbox btwo = new Checkbox("B. 2",false,qq);
  24.         Checkbox ctwo = new Checkbox("C. 3",false,qq);
  25.         Checkbox htwo = new Checkbox("",true,qq);
  26.  
  27.         CheckboxGroup ee = new CheckboxGroup();
  28.  
  29.         Label elabel = new Label("3.) 10 * 5 - 10 / 2 + 3 = ??");
  30.         Checkbox athree = new Checkbox("A. 18",false,qq);
  31.         Checkbox bthree = new Checkbox("B. 19",false,qq);
  32.         Checkbox cthree = new Checkbox("C. 17",false,qq);
  33.         Checkbox hthree = new Checkbox("",true,qq);
  34.  
  35.          CheckboxGroup rr = new CheckboxGroup();
  36.  
  37.         Label rlabel = new Label("4.) 50 * 5 / 10 + 300 - 10 = ??");
  38.         Checkbox afour = new Checkbox("A. 315",false,qq);
  39.         Checkbox bfour = new Checkbox("B. 316",false,qq);
  40.         Checkbox cfour = new Checkbox("C. 317",false,qq);
  41.         Checkbox hfour = new Checkbox("",true,qq);
  42.  
  43.         CheckboxGroup tt = new CheckboxGroup();
  44.  
  45.         Label tlabel = new Label("5.) 10 * 2 / 10 - 300 + 100 = ??");
  46.         Checkbox afive = new Checkbox("A. -198",false,qq);
  47.         Checkbox bfive = new Checkbox("B. 198",false,qq);
  48.         Checkbox cfive = new Checkbox("C. 199",false,qq);
  49.         Checkbox hfive = new Checkbox("",true,qq);
  50.  
  51.         CheckboxGroup yy = new CheckboxGroup();
  52.  
  53.         Label ylabel = new Label("6.) 10 * 5 / 50 + 1 - 2 = ??");
  54.         Checkbox asix = new Checkbox("A. 1",false,qq);
  55.         Checkbox bsix = new Checkbox("B. 0",false,qq);
  56.         Checkbox csix = new Checkbox("C. 2",false,qq);
  57.         Checkbox hsix = new Checkbox("",true,qq);
  58.  
  59.         CheckboxGroup uu = new CheckboxGroup();
  60.  
  61.         Label ulabel = new Label("7.) 8 * 3 / 3 + 450 - 400 = ??");
  62.         Checkbox aseven = new Checkbox("A. 59",false,qq);
  63.         Checkbox bseven = new Checkbox("B. 58",false,qq);
  64.         Checkbox cseven = new Checkbox("C. 57",false,qq);
  65.         Checkbox hseven = new Checkbox("",true,qq);
  66.  
  67.         CheckboxGroup ii = new CheckboxGroup();
  68.  
  69.         Label ilabel = new Label("8.) 5 + 4 * 30 / 10 - 2 = ??");
  70.         Checkbox aeight = new Checkbox("A. 14",false,qq);
  71.         Checkbox beight = new Checkbox("B. 15",false,qq);
  72.         Checkbox ceight = new Checkbox("C. 16",false,qq);
  73.         Checkbox height = new Checkbox("",true,qq);
  74.  
  75.         CheckboxGroup oo = new CheckboxGroup();
  76.  
  77.         Label olabel = new Label("9.) 5 + 100 * 1 - 2 / 100  = ??");
  78.         Checkbox anine = new Checkbox("A. 3",false,qq);
  79.         Checkbox bnine = new Checkbox("B. 4",false,qq);
  80.         Checkbox cnine = new Checkbox("C. 6",false,qq);
  81.         Checkbox hnine = new Checkbox("",true,qq);
  82.  
  83.  
  84.         Label plabel = new Label("10.) 7 * 4 / 2 - 10 + 300 = ??");
  85.         Checkbox aten = new Checkbox("A. 303",false,qq);
  86.         Checkbox bten = new Checkbox("B. 304",false,qq);
  87.         Checkbox cten = new Checkbox("C. 604",false,qq);
  88.         Checkbox hten = new Checkbox("",true,qq);
  89.  
  90.         Button done = new Button("Done");
  91.  
  92.  
  93.         public void init()
  94.         {
  95.             add(alabel);
  96.             add(slabel);
  97.  
  98.             add(qlabel);
  99.     add(aone);
  100.         aone.addItemListener(this);
  101.     add(bone);
  102.         bone.addItemListener(this);
  103.     add(cone);
  104.         cone.addItemListener(this);
  105.     add(hone);
  106.         hone.addItemListener(this);
  107.  
  108.     add(wlabel);
  109.     add(atwo);
  110.         atwo.addItemListener(this);
  111.     add(btwo);
  112.         btwo.addItemListener(this);
  113.     add(ctwo);
  114.         ctwo.addItemListener(this);
  115.     add(htwo);
  116.         htwo.addItemListener(this);
  117.  
  118.         add(elabel);
  119.     add(athree);
  120.         athree.addItemListener(this);
  121.     add(bthree);
  122.         bthree.addItemListener(this);
  123.     add(cthree);
  124.         cthree.addItemListener(this);
  125.     add(hthree);
  126.         hthree.addItemListener(this);
  127.  
  128.         add(rlabel);
  129.     add(afour);
  130.         afour.addItemListener(this);
  131.     add(bfour);
  132.         bfour.addItemListener(this);
  133.     add(cfour);
  134.         cfour.addItemListener(this);
  135.     add(hfour);
  136.         hfour.addItemListener(this);
  137.  
  138.         add(tlabel);
  139.     add(afive);
  140.         afive.addItemListener(this);
  141.     add(bfive);
  142.         bfive.addItemListener(this);
  143.     add(cfive);
  144.         cfive.addItemListener(this);
  145.     add(hfive);
  146.         hfive.addItemListener(this);
  147.  
  148.     add(ylabel);
  149.     add(asix);
  150.         asix.addItemListener(this);
  151.     add(bsix);
  152.         bsix.addItemListener(this);
  153.     add(csix);
  154.         csix.addItemListener(this);
  155.     add(hsix);
  156.         hsix.addItemListener(this);
  157.  
  158.     add(ulabel);
  159.     add(aseven);
  160.         aseven.addItemListener(this);
  161.     add(bseven);
  162.         bseven.addItemListener(this);
  163.     add(cseven);
  164.         cseven.addItemListener(this);
  165.     add(hseven);
  166.         hseven.addItemListener(this);
  167.  
  168.         add(ilabel);
  169.     add(aeight);
  170.         aeight.addItemListener(this);
  171.     add(beight);
  172.         beight.addItemListener(this);
  173.     add(ceight);
  174.         ceight.addItemListener(this);
  175.     add(height);
  176.         height.addItemListener(this);
  177.  
  178.         add(olabel);
  179.     add(anine);
  180.         anine.addItemListener(this);
  181.     add(anine);
  182.         bnine.addItemListener(this);
  183.     add(cnine);
  184.         cnine.addItemListener(this);
  185.     add(hnine);
  186.         hnine.addItemListener(this);
  187.  
  188.         add(plabel);
  189.     add(aten);
  190.         aten.addItemListener(this);
  191.     add(bten);
  192.         bten.addItemListener(this);
  193.     add(cten);
  194.         cten.addItemListener(this);
  195.     add(hten);
  196.         hten.addItemListener(this);
  197.  
  198.     add(done);
  199.         done.addActionListener(this);
  200.  
  201.         }
  202.  
  203.  
  204.     public void itemStateChanged(ItemEvent e)
  205.     {
  206.  
  207.     int answer1, answer2, answer3, answer4, answer5, answer6, answer7, answer8, answer9, answer10, totalscore;
  208.  
  209.  
  210.  
  211.  
  212.     if (aone.getState()) 
  213.     answer1=1;
  214.     if (atwo.getState())
  215.     answer2=1;
  216.     if (athree.getState())
  217.     answer3=1;
  218.     if (afour.getState())
  219.     answer4=1;
  220.     if (afive.getState())
  221.     answer5=1;
  222.     if (bsix.getState())
  223.     answer6=1;
  224.     if (bseven.getState())
  225.     answer7=1;
  226.     if (beight.getState())
  227.     answer8=1;
  228.     if (bnine.getState())
  229.     answer9=1;
  230.     if (bten.getState())
  231.     answer10=1;
  232.  
  233.  
  234.  
  235.     }
  236.  
  237.     public void actionPerformed(ActionEvent e)
  238.     {
  239.     repaint();
  240.  
  241.            int totalscore = 0; 
  242.         int answer1 = 0; 
  243.         int answer2 = 0;
  244.         int answer3 = 0;
  245.         int answer4 = 0;
  246.         int answer5 = 0;
  247.         int answer6 = 0;
  248.         int answer7 = 0;
  249.         int answer8 = 0;
  250.         int answer9 = 0;
  251.         int answer10 = 0;
  252.  
  253.  
  254.     if (done.equals(e.getActionCommand())) 
  255.         {
  256.             totalscore = answer1 + answer2 + answer3 + answer4 + answer5 + answer6 + answer7 + answer8 + answer9 + answer10;
  257.     repaint();    
  258.          done.setLabel("Total score is: " + totalscore);
  259.            }
  260.  
  261.     }
  262.  
  263.         }
  264.  
  265.  
  266.  
  267.  
  268.  
because my code looks like this (output)

http://tinypic.com/r/2vmhkzk/6
Mar 18 '13 #11
r035198x
13,262 8TB
Before you do that, how do you know if the user has answered the question correctly or not? Is there a list of answers provided or does the program calculate the correct answer from the question text?
Mar 18 '13 #12
There is a list of answers provided

ex.

1.) 1 + 1 = ??

A.) 2 B.) 3 C.) 4
Mar 18 '13 #13
r035198x
13,262 8TB
But how is the correct answer provided? i.e How do you know if the user has selected the correct answer or not?
Mar 18 '13 #14
The program just count the correct answers

Expand|Select|Wrap|Line Numbers
  1. if (aone.getState()) 
  2.     answer1=1;
  3.     if (atwo.getState())
  4.     answer2=1;
  5.     if (athree.getState())
  6.     answer3=1;
  7.     if (afour.getState())
  8.     answer4=1;
  9.     if (afive.getState())
  10.     answer5=1;
  11.     if (bsix.getState())
  12.     answer6=1;
  13.     if (bseven.getState())
  14.     answer7=1;
  15.     if (beight.getState())
  16.     answer8=1;
  17.     if (bnine.getState())
  18.     answer9=1;
  19.     if (bten.getState())
  20.     answer10=1;
Mar 18 '13 #15
r035198x
13,262 8TB
Ok. There are some fundamentals that you still need to learn and apply in your code.

1.) Don't repeat similar code. Put the repeating logic into a method and call that many times rather than repeat the whole thing. Imagine if you were asked to make 100 questions instead of ten. What would your code look like then?
2.) Read about LayoutManagers if you want to write programs with a GUI.
3.) Separate data from how it is formatted and presented to the user. e.g Make it easy to change from using A,B, C as labels of your options to using (i), (ii), (iii)

Here is an example structure of applying these principles to your program. The calculate method is just a trick to use Java's Javascript engine to calculate the value of an expression.


Expand|Select|Wrap|Line Numbers
  1. public class Prog extends Applet implements ItemListener, ActionListener {
  2.     private static final long serialVersionUID = 1L;
  3.     int totalscore;
  4.     Button done = new Button("Done");
  5.  
  6.     public void createQuestionBox(String question, String[] options, Panel panel) {
  7.         CheckboxGroup qq = new CheckboxGroup();
  8.         Label label = new Label(question + " = ??");
  9.         // Each question gets its own panel
  10.         Panel p = new Panel(new FlowLayout(FlowLayout.LEFT));
  11.         p.add(label);
  12.         for (int i = 0; i < options.length; i++) {
  13.             Checkbox ch = new Checkbox(options[i], false, qq);
  14.             ch.setName(question);
  15.             ch.addItemListener(this);
  16.             p.add(ch);
  17.         }
  18.         // each question's panel is added to the main panel
  19.         panel.add(p);
  20.     }
  21.  
  22.     public void init() {
  23.         setLayout(new BorderLayout());
  24.         setSize(400, 400);
  25.         Label alabel = new Label("MDAS Game Program");
  26.         add(alabel, BorderLayout.PAGE_START);
  27.         Label slabel = new Label("Choose the answer");
  28.         add(slabel, BorderLayout.NORTH);
  29.         // This panel will hold all the questions
  30.         Panel panel = new Panel();
  31.         panel.setLayout(new GridLayout(3, 1));
  32.         createQuestionBox("60 * 3 / 5 + 4 - 38", new String[] { "2", "3", "4" }, panel);
  33.         createQuestionBox("5 * 100 / 5 + 400 - 499", new String[] { "1", "2", "3" }, panel);
  34.         createQuestionBox("10 * 5 - 10 / 2 + 3", new String[] { "18", "19", "17" }, panel);
  35.         add(panel, BorderLayout.CENTER);
  36.         done.addActionListener(this);
  37.         add(done, BorderLayout.SOUTH);
  38.     }
  39.  
  40.     public void itemStateChanged(ItemEvent e) {
  41.         Checkbox ch = (Checkbox) e.getSource();
  42.         // calculate answer and save result somewhere, e.g in a Map
  43.         System.out.println("Correct is "+ calculate(ch.getName()) + ", user answer is " + e.getItem());
  44.     }
  45.  
  46.     public void actionPerformed(ActionEvent e) {
  47.         // add the answers from where you were saving them to
  48.     }
  49.  
  50.  
  51.     /**
  52.      * @param question
  53.      * @return result of evaluating an expression
  54.      */
  55.     public String calculate(String question) {
  56.         try {
  57.             ScriptEngineManager factory = new ScriptEngineManager();
  58.             // create a JavaScript engine
  59.             ScriptEngine engine = factory.getEngineByName("JavaScript");
  60.             // evaluate JavaScript code from String
  61.             return engine.eval(question).toString();
  62.         } catch (Exception ex) {
  63.             ex.printStackTrace();
  64.             throw new RuntimeException(ex);
  65.         }
  66.     }
  67. }
Mar 18 '13 #16
Rabbit
12,516 Expert Mod 8TB
@joelpawns, please read the FAQ before posting again. We only allow one question per thread on the forum.
Mar 18 '13 #17

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