Java program to swap two numbers

This java program swaps two numbers using a temporary variable. To swap numbers without using extra variable see another code below.

Swapping using temporary or third variable

import java.util.Scanner;   
class SwapNumbers { 
public static void main(String args[]) { 
int x, y, temp; 
System.out.println("Enter x and y"); 
Scanner in = new Scanner(System.in);   
x = in.nextInt(); 
y = in.nextInt();   
System.out.println("Before Swapping\nx = "+x+"\ny = "+y);   
temp = x; 
x = y; 
y = temp;   
System.out.println("After Swapping\nx = "+x+"\ny = "+y); 
} 
}

Output of program:

Swapping without temporary variable

import java.util.Scanner;   
class SwapNumbers { 
public static void main(String args[]) { 
int x, y; 
System.out.println("Enter x and y"); 
Scanner in = new Scanner(System.in);   
x = in.nextInt(); 
y = in.nextInt();   
System.out.println("Before Swapping\nx = "+x+"\ny = "+y);   
x = x + y; 
y = x - y; 
x = x - y;   
System.out.println("After Swapping\nx = "+x+"\ny = "+y); 
} 
}

Swapping is frequently used in sorting techniques such as bubble sort, quick sort etc.