Swap two values

Swap two Values with third Variable

import java.util.Scanner;

class SwapValues {
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int x, y, temp;

		System.out.print("Enter a value for x: ");
		x = reader.nextInt();
		System.out.print("Enter a value for y: ");
		y = reader.nextInt();
		reader.close();

		System.out.println("Before swapping:\nX: " + x + "\nY: " + y);  
		
		// swapping numbers
		temp = x;
		x = y;
		y = temp;
	
		System.out.print("After swapping:\nX: " + x + "\nY: " + y);
	}
}

Output

Enter a value for x: 10
Enter a value for y: 20
Before swapping:
X: 10
Y: 20
After swapping:
X: 20
Y: 10

Swap two Values without third Variable

import java.util.Scanner;

class SwapValues {
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int x, y;

		System.out.print("Enter a value for x: ");
		x = reader.nextInt();
		System.out.print("Enter a value for y: ");
		y = reader.nextInt();
		reader.close();

		System.out.println("Before swapping:\nX: " + x + "\nY: " + y);  
		
		// swapping numbers
		x = x + y;   
		y = x - y;   
		x = x - y; 
	
		System.out.print("After swapping:\nX: " + x + "\nY: " + y);
	}
}

Output

Enter a value for x: 4
Enter a value for y: 8
Before swapping:
X: 4
Y: 8
After swapping:
X: 8
Y: 4