The circle should be 100 pixels x 100 pixels and should be centered around your mouse pointer. The background color and circle colors should be different depending on whether the mouse pointer is on the left side of the screen or the right side of the screen. See below for an example of what your window should look like as the program executes.

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class BasicPanel extends JPanel implements KeyListener, MouseMotionListener, MouseListener {

int width; //window width

int height; //window height

char keyPressed;

int keyCode;

int mouseX, mouseY;

BasicPanel(int width, int height) {

this.width = width;

this.height = height;

Dimension d = new Dimension(width, height);

setPreferredSize(d);

//add listeners for keyboard and mouse interaction

j.addKeyListener(this);

j.addMouseMotionListener(this);

j.addMouseListener(this);

j.setFocusable(true);

j.requestFocusInWindow();

j.setVisible(true);

}

BasicPanel() {

this.width = 500;

this.height = 500;

Dimension d = new Dimension(width, height);

setPreferredSize(d);

//add listeners for keyboard and mouse interaction

addKeyListener(this);

addMouseMotionListener(this);

addMouseListener(this);

setFocusable(true);

requestFocusInWindow();

setVisible(true);

}

public static void main(String[] args) {

BasicPanel panel = new BasicPanel();

MyFrame frame = new MyFrame(panel);

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.WHITE);

}

@Override

public void keyTyped(KeyEvent e) {

keyPressed = e.getKeyChar();

}

@Override

public void keyPressed(KeyEvent e) {

keyCode = e.getKeyCode();

}

@Override

public void keyReleased(KeyEvent e) {

}

@Override

public void mouseMoved(MouseEvent e) {

mouseX = e.getX();

mouseY = e.getY();

}

@Override

public void mouseDragged(MouseEvent e) {

mouseX = e.getX();

mouseY = e.getY();

Graphics g = getGraphics();

}

@Override

public void mousePressed(MouseEvent e) {

mouseX = e.getX();

mouseY = e.getY();

}

@Override

public void mouseClicked(MouseEvent e) {

mouseX = e.getX();

mouseY = e.getY();

}

@Override

public void mouseReleased(MouseEvent e) {

}

@Override

public void mouseEntered(MouseEvent e) {

}

@Override

public void mouseExited(MouseEvent e) {

}

public int getWidth() {

return width;

}

public int getHeight() {

return height;

}

public void setSize(int width, int height) {

this.width =width;

this.height =height;

Dimension d = new Dimension(width, height);

setPreferredSize(d);

}

void delay(int time) {

try {

Thread.sleep(time);

} catch (Exception exc) {

}

}

public void animate(int framerate) {

int delay = 1000 / framerate;

while (true) {

repaint();

delay(delay);

}

}

}

class MyFrame {

private JFrame j;

private JPanel panel;

MyFrame (JPanel p) {

panel = p;

j = new JFrame();

j.setTitle(" ");

j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

j.add(panel);

j.pack();

j.setVisible(true);

}

public static void main(String[] args) {

}

public void setTitle(String title) {

j.setTitle(title);

}

}