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How do you swap two string variables without using third or temp variable in java?

File: SwapWithoutTemp .java

public class SwapWithoutTemp {
	public static void main(String args[]) {
		String a = "Love";
		String b = "You";
		System.out.println("Before swap: " + a + " " + b);
		a = a + b;
		b = a.substring(0, a.length() - b.length());
		a = a.substring(b.length());
		System.out.println("After : " + a + " " + b);
	}
}

Output:

Before swap: Love You
After : You Love

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