Swapping two numbers without third variable in java

Swapping two numbers without third variable

public static void swap1(int a, int b) {

        System.out.println("The intital value " + a + " " + b);
        a = a + b;
        b = a - b;
        a = a - b;

        System.out.println("The swapped value " + a + " " + b);

    }

    public static void swap2(int a, int b) {
        System.out.println("The intital value " + a + " " + b);
        a = a * b;
        b = a / b;
        a = a / b;

        System.out.println("The swapped value " + a + " " + b);

    }

    public static void swap3(int a, int b) {
        System.out.println("The intital value " + a + " " + b);
        a = a ^ b;
        b = a ^ b;
        a = a ^ b;

        System.out.println("The swapped value " + a + " " + b);

    }