1.Write a class called point

for the 2-D environment.

Select appropriate variable(s).

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 square,

which inheres the above point class.

Select appropriate variable(s).

Write constructors.

Write access methods for the variables.

Override the inherited print method to display variable in square 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() {

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

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

final

JTextFieldjtflb = new JTextField();

final

JTextFieldjtfkg = new JTextField();

JButtonjbtLeft = new JButton("<=");

JButtonjbtRight = 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

DecimalFormatdec = 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.Graphics;

import java.awt.Color;

public class drawPerson extends

JFrame {

public

drawPerson() {

add(new

NewPanel());

}

public static void

main(String[] args) {

drawPerson frame = new drawPerson();

frame.setTitle("Person");

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 (80, 15, 20, 25).

The text coordinate is (70, 135).

The starting and ending lines coordinate are

(90, 40, 90, 80);

(60, 50, 120, 50);

(90, 80, 70, 120); and

(90, 80, 110, 120).

Color pink, with text color magenta.