Geometry calculator

[JasmynGomez]

This was an assignment for our JAVA class

I am still a beginner and my code keeps getting errors, and I am so confused. I've tried every different way I can think of, can someone please take a look and point out some of the errors. Even just point me to the right direction. I've been working on this for 3 days. HELP!!!!!

Write a Geometry Calculator that computes the perimeter and area of the following
objects:
(a) Trapezoid (general case)
(b) Triangle (general case)
(c) Circle
Input values and formulas for area and perimeter are given in the following table:
Object Input values Area (A) Perimeter (P)
Trapezoid a = longer parallel
side
c = shorter parallel
side
b = side
d = side
( )
,
4( )
( )( )
( )( )
a c Q
A a c
a c
Q a b c d a b c d
a b c d a b c d
+
= ≠
−
= + − + − − + ×
+ − − − + + +
P=a+b+c+d
Triangle a = side
b = side
c = side
( )( )( ),
( )/2
A ss a s b s c
s a b c
= − − −
= + +
P =a+b+c
Circle r = radius
A = r2π P = 2rπ

The program has to be based on GUI helps the user to select options, enter input data, and present results. Feel free to organize and beautify your program according to your taste.If the user clicks the help button, the program should generate a help screen. If the user clicks the start button, the program should generate the geometric calculator options screen shown in Fig. 2. The list of options is: trapezoid, triangle, circle. Figure 3 shows an example of calculation of the area and perimeter of triangle. The user enters inputs (a,b,c) and then clicks the Calculate button. After that the results appear in the area and
perimeter fields. If the input values are incorrect (not positive numbers, or a=c for trapezoid, or the sum of two sides of triangle is less then or equal to the third side of triangle) your program should open an error message window and display an appropriate error message. For all geometric objects the output should be the same (area and perimeter).

__________________________________________________ _______

This is what I have so far


import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.border.*;
import javax.swing.JTextField;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.text.*;
public class TriangleCalculator extends JFrame implements
ActionListener {
public static final int WIDTH = 250;
public static final int HEIGHT = 250;
public static void main(String[] args)
{
TriangleCalculator gui = new TriangleCalculator();
gui.setVisible(true);
}

///// Create the selectPanel on buttonPanel/////

// selectPanel contains the selectMenuBar
JPanel selectPanel = new JPanel();
buttonPanel.add(selectPanel, BorderLayout.NORTH);
selectPanel.setLayout(new GridLayout(3, 1));
selectPanel.setBackground(Color.LIGHT_GRAY);
// Create the selectMenuBar in the first grid of selectPanel
JMenuBar selectMenuBar = new JMenuBar();
selectPanel.add(selectMenuBar);

// Create the selectMenu in selectMenuBar
JMenu selectMenu = new JMenu("Select Figure");
selectMenuBar.add(selectMenu);

// Create the circleMenuItem in selectMenu
JMenuItem circleMenuItem = new JMenuItem("Circle");
circleMenuItem.addActionListener(new CircleListener());
selectMenu.add(circleMenuItem);

// Create the trapezoidMenuItem in selectMenu
JMenuItem trapezoidMenuItem = new JMenuItem("Trapezoid");
trapezoidMenuItem.addActionListener(new TrapezoidListener());
selectMenu.add(trapezoidMenuItem);

// Create the triangleMenuItem in selectMenu
JMenuItem triangleMenuItem = new JMenuItem("Triangle");
triangleMenuItem.addActionListener(new TriangleListener());
selectMenu.add(triangleMenuItem);


//Create the input textfields
jtfInput_a = new JTextField(10);
jtfInput_b = new JTextField(10);
jtfInput_c = new JTextField(10);
inputPanel.setLayout(new GridLayout(2,3));

//first row
inputPanel.add(new JLabel("a", JLabel.CENTER));
inputPanel.add(new JLabel(" "));
inputPanel.add(new JLabel("b", JLabel.CENTER));


//Create solve panel with the button
SolvePanel = new JPanel();
JButton solveButton = new JButton("Calculate.");
SolveButton.addActionListener(this);
SolvePanel.add(SolveButton);
biggerPannel.add(solvePanel, BorderLayout.CENTER);

//Create result panel with title and grid (2,2)
resultPanel = new JPanel();
resultPanel.add(jtfResultArea);
resultPanel.add(new JLabel("Perimeter= ", label.RIGHT));

//Clear all input
jtfInput_a.setText(" "); //input field

//Display
jtfResults.Area.setText(string.valueof()); //output field
}


I keep getting this error.....
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Syntax error, insert "}" to complete MethodBody

at calc.main(calc.java:7)

Hope you can help I think I am about to climb the wall =)

[BigDaddyLH]

Your code needs a lot of help. I honestly think it's beyond the sort of help you can get through a forum. You need someone to sit down with you and explain basic syntax, or you need to stop and reread your textbook/notes/tutorial.

[JasmynGomez]

Thank you for the advice.

I did however manage to create the starting menu. I was looking for guidance. I am afterall a newbie hence I really don't know anything. I am in college and this is not my major, it was an extra credit that I took. The professor really doesn't help at all. I am trying to learn it through books, but its not easy. I was hoping someone would point me in the right direction, ( as in maybe tutorials) instead I was told what was obvious and just like our professor gave me no help whatsoever.

Thank you for the reply nonetheless

As you can see I am not as hopeless

________________________________________________

import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.JButton;
import javax.swing.JFrame;

public class Final extends Frame {
JButton HELP;
JButton START;
JLabel Main;
JTextField textfield_1;

public Final() {
FinalLayout customLayout = new FinalLayout();

setFont(new Font("Helvetica", Font.PLAIN, 12));
setLayout(customLayout);

HELP = new JButton("HELP");
HELP.addActionListener(new HELPListener( ));
add(HELP);

START = new JButton("START");
add(START);

Main = new JLabel("Welcome to the Geometry calculator");
add(Main);

textfield_1 = new JTextField("For instructions click HELP, or click START");
add(textfield_1);

setSize(getPreferredSize());

addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}

public static void main(String args[]) {
Final window = new Final();

window.setTitle("Final Project");
window.pack();
window.show();
}
}

class FinalLayout implements LayoutManager {

public FinalLayout() {
}

public void addLayoutComponent(String name, Component comp) {
}

public void removeLayoutComponent(Component comp) {
}

public Dimension preferredLayoutSize(Container parent) {
Dimension dim = new Dimension(0, 0);

Insets insets = parent.getInsets();
dim.width = 320 + insets.left + insets.right;
dim.height = 240 + insets.top + insets.bottom;

return dim;
}

public Dimension minimumLayoutSize(Container parent) {
Dimension dim = new Dimension(0, 0);
return dim;
}

public void layoutContainer(Container parent) {
Insets insets = parent.getInsets();

Component c;
c = parent.getComponent(0);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+96,128,40); }
c = parent.getComponent(1);
if (c.isVisible()) {c.setBounds(insets.left+168,insets.top+96,128,40) ;}
c = parent.getComponent(2);
if (c.isVisible()) {c.setBounds(insets.left+16,insets.top+8,288,48);}
c = parent.getComponent(3);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+168,272,56) ;}
}
}