For this lab assignment, you will create an applet which will be interactive (us

Question

For this lab assignment, you will create an applet which will be interactive (uses listeners by implementing MouseListener and MouseMotionListener interfaces or by extending MouseAdapter class). l. 150%I write an applet called Blackboard, which displays and behaves as shown below: when it runs initially: Applet Viewer: Blackboard.class Applet Erase Board Applet started. When the user draws on the black board (panel) with the mouse: Applet Viewer: Blackboard.class Applet Erase Board Applet started.

Explanation / Answer

//BlackBoard Class by implementing MouseMotionListener

import java.awt.*;

import java.awt.event.*;

import javax.swing.JButton;

import java.applet.*;

public class BlackBoard extends Applet implements MouseMotionListener {

public void init() {

addMouseMotionListener(this);

setBackground(Color.black);

repaint();

JButton button=new JButton("Erase Board");

button.addActionListener(new ActionListener(){  

public void actionPerformed(ActionEvent e){  

repaint();

}  

});

add(button);

}

public void mouseDragged(MouseEvent me) {

Graphics g = getGraphics();

g.setColor(Color.white);

g.fillOval(me.getX(), me.getY(), 5, 5);

}

public void mouseMoved(MouseEvent me) {

}

}

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