Week 05 : Programming Assignments - NPTEL >> Programming In Java - 2025

Week 05 : Programming Assignment 1

Solution :

import java.util.Scanner;

interface Number {
    int findSqr(int i);  // Returns the square of n
}
		

		// Answer
		class A implements Number {
  			//#Define a method to find the square of a number
			int i, square;
			public int findSqr(int i) {
				square = i * i;
				return square;
			}
		}
		//End
		

	public class W05_P1{ 
        public static void main (String[] args){ 
	      A a = new A();   //Create an object of class A
           // Read a number from the keyboard
           Scanner sc = new Scanner(System.in);  
           int i = sc.nextInt();
           System.out.print(a.findSqr(i)); 
    } 
}

Week 05 : Programming Assignment 2

Solution :

import java.util.Scanner;

interface GCD {
    public int findGCD(int n1,int n2);
}

		// Answer
		class B implements GCD {
			// Create a method to calculate GCD
			public int findGCD(int n1, int n2) {
				if (n1 == 0 && n2 == 0) {
					return 0;   
				} else if (n2 == 0) {
					return n1;  
				} else {
					return findGCD(n2, n1 % n2); 
				}
			}
		}

		//End
		

		public class W05_P2{ 
        public static void main (String[] args){ 
	      B a = new B();   //Create an object of class B
            // Read two numbers from the keyboard
            Scanner sc = new Scanner(System.in);  
            int p1 = sc.nextInt();
	       int p2 = sc.nextInt();
            System.out.print(a.findGCD(p1,p2)); 
    } 
}

Week 05 : Programming Assignment 3

Solution :

import java.util.Scanner;
  
  public class W05_P3 {
  public static void main(String[] args) { 
      int a, b;
      Scanner input = new Scanner(System.in);
       // Read any two values for a and b
       int result;  

       a = input.nextInt();
       b = input.nextInt();

		// Answer
		//Get the result of a/b;


		//# try block to divide two numbers and display the result
      try {
              result = a / b;
              System.out.print(result);
     	   }
          //# catch block to catch the ArithmeticException
      catch (ArithmeticException e) {
            System.out.print("Exception caught: Division by zero.");
          }
			// End
		

	   }
}

Week 05 : Programming Assignment 4

Solution :

//Prefixed Fixed Code:
import java.util.Scanner;
import java.util.InputMismatchException;

public class W05_P4 {
  public static void main(String[] args) {
      Scanner sc = new Scanner(System.in); 
	int length = sc.nextInt(); 
	// create an array to save user input 
	int[] name = new int[length];
     int sum=0;//save the total sum of the array.

		// ANSWER
		/* 
Define try-catch block to save user input in the array "name"
If there is an exception then catch the exception otherwise print the total sum of the array. 
*/


     try {
       for (int i =0; i < length; i++)
       {
         name[i] = sc.nextInt();
       sum = sum + 	name[i];
       }
       System.out.print(sum);
     }
       catch(InputMismatchException e) {
        System.out.print("You entered bad data.");
     }

		// END

		
    }
}

Week 05 : Programming Assignment 5

Solution :

import java.util.Scanner;
public class W05_P5{
      public static void main (String   args[ ] ) {
		Scanner scan = new Scanner(System.in);
          int i=scan.nextInt();
          int j;
		

	//ANSWER
	// Put the following code under try-catch block to handle exceptions
		try {
				switch (i) {
				case 0 : 
					int zero = 0; 
					j = 92/ zero; 		
					break;
				case 1: 
					int b[ ] = null; 
					j = b[0] ; 	
					break;
				default:
					System.out.print("No exception");
			 }
		}
		catch (NullPointerException ne)
		{
		  System.out.print("java.lang.NullPointerException");
		}
		catch (ArithmeticException ae)
		{
		  System.out.print("java.lang.ArithmeticException: / by zero");
		}
		//END
		

	
    }
}