怎样在Canvas上画图....(UP者有分喽！！！！)

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Answer 1

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Answer 2

//ImagePain.javaimport java.awt.*;
import java.awt.event.*;public class ImagePain extends Frame
{


public ImagePain()
{
ImageCanvas images = new ImageCanvas("images\\photo.jpg");
add(images);
}

public static void main(String[] args)
{
ImagePain f = new ImagePain();     
f.addWindowListener( new WindowAdapter() 
{         
public void windowClosing( WindowEvent e) 
{
System.exit(0);
}
});     
f.setSize(800, 600);     
f.show(); 
}

class ImageCanvas extends Canvas
{
Image i;
public ImageCanvas(String imageName)
{
i = Toolkit.getDefaultToolkit().getImage(imageName);
MediaTracker mt = new MediaTracker(this);
try
{
mt.addImage(i,0);
mt.waitForID(0);
}
catch(InterruptedException e)
{
e.printStackTrace();
}
}

public void paint(Graphics g)
{
g.drawImage(i,0,0,this);
}

public Dimension getPreferredSize()
{
int w = i.getWidth( this );
int h = i.getHeight( this );
return new Dimension( w, h );
}
}
}