2 B. Write a Java program to convert a decimal number to binary number and vice versa.

 Program :

import java.util.Scanner;

class Pract2b

{

public static void main(String args[])

{

int num2;

String num1;

Scanner in =new Scanner(System.in);

 

System.out.print("Enter binary number");

num1=in.nextLine();

System.out.print("Enter decimal number");

num2=in.nextInt();

 

 

System.out.println("Binary to Decimal:-"+Integer.parseInt(num1,2));

System.out.println("Decimal to Binary:-"+Integer.toBinaryString(num2));

 

}

}