package com.javatraineronline;

public class SwapNumber {

	public static void swap(int a, int b) {
		
		// Assigning 'a' value to 'temp'
		int temp = a;
		
		// Assigning 'b' value to 'a'
		a = b;
		
		// Assigning 'temp' value to 'b'
		b = temp;
		
		// Printing before swapping
		System.out.println("After Swapping A : "+a+" B: "+b);
	}
	
	public static void main(String[] args) {
		
		// Declaring the 'a' and 'b' variable
		int a = 10; int b = 20;
		
		// Printing before swapping
		System.out.println("Before Swapping A : "+a+" B: "+b);
	
		// Calling Swapping Method.
		swap(a, b);
	}
	
}
Output for SwapNumber.java
Before Swapping A : 10 B: 20 ..
After Swapping A : 20 B: 10 ..