Etchasketch

I'm writing a program that will operate like an etchasketch, one that will draw on the JPanel using the arrow keys. The JPanel gets erased when the window is resized...as of now, I have this.
//EtchaSketch
//Feb 25, 2004
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.event.*;
import java.awt.event.KeyEvent;
import java.awt.*;
import javax.swing.*;
public class EtchSketch extends JFrame implements KeyListener
 private JPanel label, sketcharea;
 private JLabel instruct;
 private int lastx = 250, lasty = 250, code;
 private final int size = 10;
EtchSketch()
 addWindowListener(new WindowAdapter()
 {public void windowClosing(WindowEvent e)
 {System.exit(0);}});
 //set up instructions
 JPanel label = new JPanel();
 label.setBackground(Color.white);
 JLabel instruct = new JLabel("<html>Use arrow keys to move about on the surface. Hold the shift key down to draw on the surface with the arrow keys. Your drawing will be erased if you resize the window.</html>");
 label.add(instruct);
 getContentPane().add(label, "North");
 //set up drawing board
 JPanel sketcharea = new JPanel(){
 public void paintComponent(java.awt.Graphics g) {
 super.paintComponent(g);
 Graphics2D g2 = (Graphics2D)g;
 g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
 RenderingHints.VALUE_ANTIALIAS_ON);
 g.setColor(Color.blue);
 if(code == KeyEvent.VK_UP){g2.fillRect(lasty = lasty-10, lastx, size, size);
 repaint();};
 if(code == KeyEvent.VK_DOWN){g2.fillRect(lasty = lasty+10, lastx, size, size);
 repaint();};
 if(code == KeyEvent.VK_RIGHT){g2.fillRect(lasty, lastx = lastx+10, size, size);
 repaint();};
 if(code == KeyEvent.VK_LEFT){g2.fillRect(lasty, lastx = lastx-10, size, size);
 repaint();};
 sketcharea.setOpaque(true);
 sketcharea.setBackground(Color.white);
 getContentPane().add(sketcharea, "Center");
public void keyPressed(java.awt.event.KeyEvent ke)
 int code = ke.getKeyEvent();
public void keyTyped(KeyEvent ke)
public void keyReleased(KeyEvent ke)
public static void main(String [] args){
 JFrame jf = new EtchSketch();
 jf.setSize(500, 500);
 jf.setVisible(true);
}at the moment I'm getting this error.
D:\root\Documents\Java\EtchSketch.java:61: cannot resolve symbol
symbol : method getKeyEvent ()
location: class java.awt.event.KeyEvent
 int code = ke.getKeyEvent();
^
1 error
Process completed.

hi, i'm doing a similar program as well, and I was
wondering where would I add that "this" code thing in
the progrma?As you're learning, it's important to figure out how to search the Internet and existing documentation to find your solution. For instance, the following should help you greatly in your cause:
Introduction to Event Listeners
http://javaalmanac.com/egs/java.awt.event/pkg.htmlThe Java Developers Almanac 1.4: java.awt.event

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Last edited by Kolibry (2014-10-19 20:56:04)

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mirrorlist) vim /etc/pacman/mirrorlist ;;
termite) vim ~/.config/termite/config ;;
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vim) vim ~/.vimrc ;;
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Last edited by Kolibry (2014-10-19 20:40:15)

Etchasketch

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