The document provides instructions for writing two Java classes: a Point class that defines a point in 2D space with x and y coordinates, constructors, getter/setter methods, and a print method; and a Square class that inherits from Point, adds its own variables, and overrides the print method to display the point and square variables. A test program is then to be written to test the classes.

1. Write a class called point in JAVA
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.
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Write a class called square,
which inheres the above point class in JAVA
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.
Solution
Point class is given below with proper comments
import java.io.*;
public class Point
{
private double a;
private double b;
public Point(double x, double y)
{
this.a=x;
this.b=y;
}

2. public String Print(){
return "("+ this.a+","+this.b+")";
}
//getter methods
public double getPointa() {
return a;
}
//getter methods
public double getPointb() {
return b;
}
//setter methods
public void setPointa(double x)
{
this.a = x;
}
public void setPointb(double y)
{
this.b = y;
}
}
Test Program to test Point class
import java.io.*;
public class PointTest{
public static void main(String args[])
{
//creating Point object
Point point= new Point(5,2);
System.out.println(point.Print());
}
}