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canvas does not display image insde a jframe

Knightley
Knightley asked
on
Medium Priority
713 Views
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()
      {
    super("Spiel");
    setBounds(0, 0, 372, 272);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   
    Container con = this.getContentPane();
   
    GCanvas canvas = new GCanvas();
    con.add(canvas);
    setVisible(true);
  }
 
  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);
  }
}
Comment
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Java Developer
CERTIFIED EXPERT
Top Expert 2010
Commented:
>     g.drawImage(_image, 0, 0, null);

try:

    g.drawImage(_image, 0, 0, this);


or better still use a JLabel instead of GCanvas

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Author

Commented:
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?
Mick BarryJava Developer
CERTIFIED EXPERT
Top Expert 2010

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

Author

Commented:
ok thanx
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