Question

Write a program in Java by using a class with the following specifications class name :- rectangle data members/instance variables :- int length and breadth of the rectangle
Member functions:-
void input data () :- to accept length and breadth of the rectangle
void calculate () :- to find area, perimeter and diagnol of the rectangle
void output data () :- to print the results

Answer 1

import java.util.*;

import java.lang.*;

import java.io.*;

class rectangle

{

   int length, breadth, a, p, d;

   void input_data()

   {

       Scanner Sc=new Scanner(System.in);

       System.out.print("Enter length : ");

       length = Sc.nextInt();

       System.out.print("Enter breadth : ");

       breadth = Sc.nextInt();

   }

   void calculate()

   {

       a = length*breadth;

       p = 2*(length+breadth);

       d = (int)Math.sqrt(length*length + breadth*breadth);

   }

   void output_data()

   {

       System.out.println("Area : "+a);

       System.out.println("Perimeter : "+p);

       System.out.println("Diagonal :"+d);

   }

public static void main (String[] args) throws java.lang.Exception

{

              rectangle rect = new rectangle();

              rect.input_data();

              rect.calculate();

              rect.output_data();

}

}