appletdemo.java

java可以实现一些小程序的编写

import java.applet.*;import java.awt.*;
import java.awt.event.*;
public class  AppletDemo extends Applet implements MouseListener
{ double x,y;
 public void init()
 {x=-1;y=-1; addMouseListener(this); 
 }
 public void paint(Graphics g)
 {if(x!=-1&&y!=-1 &&x>=80) 
   {g.setColor(Color.blue);  
   g.drawOval((int)x,(int)y,10,10);
   }
  else if (x!=-1&&y!=-1&& x<80&&x>40 ) 
   {g.setColor(Color.red);  
    g.drawString("小心地雷",(int)x+5,(int)y+5); 
    g.drawString("往右走",(int)x+5,(int)y+15);
  }
 else if (x!=-1&&y!=-1&& x<=40 ) 
   {g.setColor(Color.red);  
    g.drawString("地雷爆炸",(int)x+15,(int)y+5); 
     g.fillOval((int)x,(int)y,20,20);
  }
}
 public void mousePressed(MouseEvent e)
 { x=e.getX();y=e.getY();
   repaint();
}
 public void mouseReleased(MouseEvent e)
 {}
 public void mouseEntered(MouseEvent e)
 {}
 public void mouseExited(MouseEvent e)
 {}
 public void mouseClicked(MouseEvent e)
 {}
}