Swapping of two numbers without using temporary variable

Swapping of two numbers without using temporary variable:
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1st way:
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package files;

public class SwapProgDemo {

public static void main(String[] args) {

int x = 10;

        int y = 20;
        
        System.out.println("Before swap:");
        System.out.println("x value: "+x);
        System.out.println("y value: "+y);
        
        x = x+y;
        y = x-y;
        x = x-y;
        
        System.out.println("After swap:");
        System.out.println("x value: "+x);
        System.out.println("y value: "+y);

}

}

OUTPUT:

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Before swap:

x value: 10

y value: 20

After swap:

x value: 20

y value: 10

2nd way:

========

package files;

public class SwappROGdEMO {

public static void main(String[] args) {

int x = 10;

        int y = 20;

        

        System.out.println("Before swap:");

        System.out.println("x value: "+x);

        System.out.println("y value: "+y);

        

        x = x*y;

        y = x/y;

        x = x/y;

        

        

        System.out.println("After swap:");

        System.out.println("x value: "+x);

        System.out.println("y value: "+y);

}

}

OUTPUT:

--------------

Before swap:

x value: 10

y value: 20

After swap:

x value: 20

y value: 10