1. Write a class called point for the 2-D environment.

Write constructors.

Write access methods for the variables.

Write a Print method to display the variables when called.

Write a test program to test it.

2. Write a class called circle, which inheres the above point class.

Write constructors.

Write access methods for the variables.

Override the inherited Print method to display variable in circle and point.

Write a test program to test it.

3. Start from the following code, and add Action Listener to make it functional. (Need about 10 lines)

Note: 1 lb = .0.453592 kg.

import javax.swing.*;

import

java.awt.GridLayout;

import

java.awt.event.*;

import

java.text.DecimalFormat;

public class weightConverter extends JFrame {

public static void

main(String[] args) {

JFrame frame = new weightConverter();

frame.setTitle("Weight");

frame.setSize(200, 100);

frame.setLocationRelativeTo(null);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

public

weightConverter() {

JLabel lbllb = new JLabel("lb",SwingConstants.CENTER);

JLabel lblkg = new JLabel("kg",SwingConstants.CENTER);

final

JTextField jtflb = new JTextField();

final

JTextField jtfkg = new JTextField();

JButton jbtLeft = new JButton("<=");

JButton jbtRight = new JButton("=>");

JPanel panel = new JPanel(new GridLayout(2, 3));

panel.add(lbllb);

panel.add(jbtLeft);

panel.add(lblkg);

panel.add(jtflb);

panel.add(jbtRight);

panel.add(jtfkg);

this.add(panel); // Add panel to the frame

final

DecimalFormat dec = new DecimalFormat("#.00");

}

}

4. Start from the given class, and create a NewPanel class to draw a figure like below: (Need about 15 lines)

import javax.swing.*;

import java.awt.Color;

import

java.awt.Graphics;

public class drawSun extends

JFrame {

public

drawSun() {

add(new

NewPanel());

}

public static void

main(String[] args) {

drawSun frame = new drawSun();

frame.setTitle("Sun");

frame.setSize(200, 200);

frame.setLocationRelativeTo(null); // Center the frame

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}

The circle coordinate and size is (70, 60, 40, 40)

The text coordinate is: (80, 85)

The starting and ending lines coordinate are

(120, 80, 134, 80)

(110, 60, 120, 50)

(90, 36, 90, 50)

(60, 50, 70, 60)

(46, 80, 60, 80)

(60, 110, 70, 100)

(90, 110, 90, 124)

(110, 100, 120, 110).

Color orange, with text color red.