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import java.awt.*;
import java.awt.event.*;

public class test extends MouseMotionAdapter
{
    Button b1;
    public static void main(String argv[])
    {
        new test();
    }
    public test()
    {
        Frame f = new Frame("test");
        f.setLayout(null);
        b1 = new Button("Button1");
        b1.setSize(50,50);
        b1.setLocation(20,20);
        f.add(b1);
        f.addMouseMotionListener(this);
        f.addWindowListener(new WindowEventHandler());
        f.setSize(300,300);
        f.setVisible(true);
    }
    
    public void mouseDragged(MouseEvent e)
    {
        if(b1.hasFocus())
        {
            int x = e.getX();
            int y = e.getY();
            b1.setLocation(x,y);
        }
    }
}

class WindowEventHandler extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        System.exit(0);
    }
}

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