canvas does not display image insde a jframe

Posted on 2006-11-07
Last Modified: 2011-09-20
Any body could help?
the app runs  without error, the image just does not show inside the jframe.

import java.awt.*;
import javax.swing.*;
import java.awt.geom.*;
import java.awt.image.*;

class t extends JFrame
      public t()
    setBounds(0, 0, 372, 272);
    Container con = this.getContentPane();
    GCanvas canvas = new GCanvas();
  public static void main(String arg[])
        new t();

class GCanvas extends Canvas // create a canvas for your graphics
      public Toolkit _toolkit;
      public Image _image;
  GCanvas() //constructor
        _toolkit = Toolkit.getDefaultToolkit();
            _image = _toolkit.getImage("s.jpg");
  public void paint(Graphics g) // display shapes on canvas
    // Graphics2D g2D = (Graphics2D) g;
    g.drawImage(_image, 0, 0, null);
Question by:Knightley
  • 2
  • 2
LVL 92

Accepted Solution

objects earned 40 total points
ID: 17892834
>     g.drawImage(_image, 0, 0, null);


    g.drawImage(_image, 0, 0, this);

or better still use a JLabel instead of GCanvas

Author Comment

ID: 17892882
well that is fast, works, thanx.

about JLabel, what i need is show a image and then get some mouse
position while i click my mouse on the image. both left mouse key
and right mouse key, any tutorial on this?

i guess i need to use a mouseAdapter or something but not sure
how to determine if the left or the right ouse button is clicked.

does JLabel support all this?
LVL 92

Expert Comment

ID: 17893231
JLabel can display ImageIcon's
You can use a MouseListener to get clicks

Author Comment

ID: 17893581
ok thanx

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