Taking values from a text file inside paintcomponent

crochunter

Hi,

I want to read values from a text files from specified fields and use them as values to fill my methods inside the paintComponent() method. I am using for loop to do that but not able to do it properly. Can somebody give me a good example code howto do it ??
Here is extract of my code below:-

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 public class testing extends JPanel{

    private ArrayList<Myclass> lines;

    private HashMap<String,Color>  hm = new HashMap<String,Color>();

    private int firstvalue;

    private int width;

    private String color;

    private int f[];
 
   public void drawrects() {

         String n = null;  

    try{

            BufferedReader fh = new BufferedReader(new FileReader("myinput.txt"));    

            while(true){

               n = fh.readLine();

               if(n == null){

                  break;

               }else{

                  String f[] = n.split("\t");

                        int firstvalue = Integer.parseInt(f[3]);

                        int width = Integer.parseInt(f[4]); 

                        Color color = (Color)hm.get(f[7]);

                        Myclass lineinformation = new Myclass(color);

                        Myclass lineinformation = new Myclass(color);

                        lines.add(lineinformation);
 
   }       

          }

          fh.close();

       } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e2) {

            e2.printStackTrace();

         }  

     } 

 public void paintComponent(Graphics g) {

    super.paintComponent(g);

    Graphics2D g2d = (Graphics2D) g;

     g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,  

              RenderingHints.VALUE_ANTIALIAS_ON);  

    Myclass myobject = new Myclass();

    int x = myobject.firstvalue;

    int y = 60;

    int w = myobject.width;

    int z = 27;

    g2d.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    for(int i=0; i<Myclass.f.length; i++){

    GradientPaint gpi = new GradientPaint(0, 0, lines.get(i).getColor(), 0, 20, Color.white, true);

    g2d.drawRect(x, 60, w, 27);

    g2d.setColor(gpi);

    g2d.fillRect(x, 60, w, 27);
 
                                      }

 }

Thanks

r035198x

What specific problems are you having with your code?

crochunter

Hi... Actually I donno howto make my for loop work in this case. I am taking values from the text file. Can you give some clues.

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 import java.io.*;

import java.util.ArrayList;

import java.util.Arrays;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.BufferedReader;

import java.awt.*;

import javax.swing.*;

import java.awt.Color;

import javax.swing.JFrame;

import java.util.ArrayList;

import java.io.BufferedReader;

import java.util.HashMap;

import  java.awt.geom.Rectangle2D;

import java.awt.Rectangle;
 
/**

 *

 * @author crochunter

 */

public class testing extends JPanel {

  private ArrayList<Integer> heights;

  private ArrayList<testing> widths; 

  private int first;

  private int width;

   public int heights() {

         String n = null;  

    try{

            BufferedReader fh = new BufferedReader(new FileReader("input.txt"));    

            while(true){

               n = fh.readLine();

               if(n == null){

                  break;

               }else{

                  String f[] = n.split("\t");

                        int first = Integer.parseInt(f[3]);

                        int second = Integer.parseInt(f[4]);

                       // String color = f[7];

                        Integer iscn = (int) first;

                        int width = second - first;

                        heights = new ArrayList(Arrays.asList(f[3]));

                    for (int i =0; i < heights.size();i++){

                    System.out.println(heights); 

                        heights.get(i);

                                      }
 
   }   
 
          }
 
          fh.close();

       } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e2) {

            e2.printStackTrace();

         }  

       return first;

     } 

 public int widths() {

         String n = null;  

    try{

            BufferedReader fh = new BufferedReader(new FileReader("input.txt"));    

            while(true){

               n = fh.readLine();

               if(n == null){

                  break;

               }else{

                  String f[] = n.split("\t");

                        int first = Integer.parseInt(f[3]);

                        int second = Integer.parseInt(f[4]);
 
                        int width = second - first;

                        widths = new ArrayList(Arrays.asList(width));

                for (int i =0; i < widths.size();i++){

                    System.out.println(widths);
 
                   }

   }   
 
          }
 
          fh.close();

       } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e2) {

            e2.printStackTrace();

         } 

         return width;

     } 
 
   public void paintComponent(Graphics g){

       super.paintComponent(g);

    Graphics2D g2d = (Graphics2D) g;

               testing wow = new testing();

        // for(int i=0; i<heights.size();i++) { // I want my for loop to take values from my file one by one which is not working

           int x = wow.heights();

           int y = wow.widths();
 
           g2d.setColor(Color.BLUE); 

           g2d.drawRect(x,60,y,27);
 
}

   public static void main(String args[]){
 
    JFrame frame = new JFrame();

    frame.setTitle("My First Program");

    frame.setSize(1000, 200);

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Container contentPane = frame.getContentPane();

    contentPane.add(new testing());

    frame.show();

  }
 
   }

Thanks

JosAH

Do you have another handle 'cowboyrocks2009'?

kind regards,

Jos

crochunter

No why ? I was curious to know how for loop will work in this case.

Thanks

Taking values from a text file inside paintcomponent

re: Taking values from a text file inside paintcomponent

re: Taking values from a text file inside paintcomponent

re: Taking values from a text file inside paintcomponent

re: Taking values from a text file inside paintcomponent

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