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package practice1;
import java.awt.*;
import javax.swing.*;
public class MyTest
{
public static void main(String args[])
{
JFrame w = new JFrame();
w.setSize(800, 600);
MyPanel mp = new MyPanel();
w.add(mp);
Thread t = new Thread(mp);
t.start();
w.setVisible(true);
}
}
class MyPanel extends JPanel implements Runnable
{
int x = 400;
int y = 100;
int att = 0;
public void paint(Graphics g)
{
super.paint(g);
setBackground(Color.black);
g.setColor(Color.white);
g.fillOval(x, y, 20, 20);
}
public void run()
{
while(true)
{
switch(att)
{
case 0:
x++;
y++;
break;
case 1:
x--;
y++;
break;
case 2:
x--;
y--;
break;
case 3:
x++;
y--;
}
if (x > 750)
{
if (att == 0)
{
att = 1;
}
else
{
att = 2;
}
}
if (y > 530)
{
if (att == 1)
{
att = 2;
}
else
{
att = 3;
}
}
if (x < 10)
{
if (att == 2)
{
att = 3;
}
else
{
att = 0;
}
}
if (y < 10)
{
if (att == 3)
{
att = 0;
}
else
{
att = 1;
}
}
try
{
Thread.sleep(10);
}
catch(Exception e)
{
}
repaint();
}
}
}
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