In-Place Swap Demo

InPlaceSwapDemo.java

import java.util.Arrays;

public class InPlaceSwapDemo {

	public static void main(String[] args) {
		int[] numbers = {3, 7};
		char[] str = {'b', 'z'};
		
		System.out.println("int In-Place Swap");
		
		System.out.println(Arrays.toString(numbers));
		inPlaceSwap(numbers, 0, 1);
		System.out.println(Arrays.toString(numbers));
		
		System.out.println("\nint In-Place Xor-Swap");
		
		System.out.println(Arrays.toString(numbers));
		inPlaceXorSwap(numbers, 0, 1);
		System.out.println(Arrays.toString(numbers));
		
		System.out.println("\nchar In-Place Swap");
		
		System.out.println(Arrays.toString(str));
		inPlaceSwap(str, 0, 1);
		System.out.println(Arrays.toString(str));
		
		System.out.println("\nchar In-Place Xor-Swap");
		
		System.out.println(Arrays.toString(str));
		inPlaceXorSwap(str, 0, 1);
		System.out.println(Arrays.toString(str));
		
	}
	
	private static void inPlaceSwap(int[] numbers, int x, int y) {
		numbers[x] = numbers[x] + numbers[y];
		numbers[y] = numbers[x] - numbers[y];
		numbers[x] = numbers[x] - numbers[y];
	}
	
	private static void inPlaceXorSwap(int[] numbers, int x, int y) {
		numbers[x] = numbers[x] ^ numbers[y];
		numbers[y] = numbers[y] ^ numbers[x];
		numbers[x] = numbers[x] ^ numbers[y];
	}
	
	private static void inPlaceSwap(char[] string, int x, int y) {
		string[x] = (char)( (int)string[x] + (int)string[y] );
		string[y] = (char)( (int)string[x] - (int)string[y] );
		string[x] = (char)( (int)string[x] - (int)string[y] );
	}
	
	private static void inPlaceXorSwap(char[] string, int x, int y) {
		string[x] = (char)( (int)string[x] ^ (int)string[y] );
		string[y] = (char)( (int)string[x] ^ (int)string[y] );
		string[x] = (char)( (int)string[x] ^ (int)string[y] );
	}

}

Output;

int In-Place Swap
[3, 7]
[7, 3]

int In-Place Xor-Swap
[7, 3]
[3, 7]

char In-Place Swap
[b, z]
[z, b]

char In-Place Xor-Swap
[z, b]
[b, z]