Java using in Reverse Number and Swap Numbers program

Reverse Number using Java

public class ReverseNumber

{  

public static void main(String[] args)

{

int number = 1234;

int reversedNumber = 0;

int temp = 0;              

while(number > 0)

{

temp = number%10;

reversedNumber = reversedNumber * 10 + temp;

number = number/10;                       

}

System.out.println("Reversed Number is: " + reversedNumber);

   }

}

Swap Numbers Java

public class SwapElements

{

public static void main(String[] args)

{               

int num1 = 10;

int num2 = 20;             

System.out.println("Before Swapping");

System.out.println("Value of num1 is :" + num1);

System.out.println("Value of num2 is :" +num2);

swap(num1, num2);

}

private static void swap(int num1, int num2)

{       

int temp = num1;

num1 = num2;

num2 = temp;         

System.out.println("After Swapping");

System.out.println("Value of num1 is :" + num1);

System.out.println("Value of num2 is :" +num2);             

   }

}

Swap Numbers without Using Third Variable

public class SwapElementsWithoutThirdVariable

 {

public static void main(String[] args)

{

int num1 = 10;

int num2 = 20;      

System.out.println("Before Swapping");

System.out.println("Value of num1 is :" + num1);

System.out.println("Value of num2 is :" +num2);

num1 = num1 + num2;

num2 = num1 - num2;

num1 = num1 - num2;

System.out.println("Before Swapping");

System.out.println("Value of num1 is :" + num1);

System.out.println("Value of num2 is :" +num2);

   }

}