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StringSwap.java

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package misc;

public class StringSwap {

public static void main(String[] args) {

String a = "Hello";

String b = "World";

System.out.println("Strings before swap: a = " + a + " and b = " + b);

a = a + b;

// Store initial string a in string b

b = a.substring(0, a.length() - b.length());

// Store initial string b in string a

a = a.substring(b.length());

System.out.println("Strings after swap: a = " + a + " and b = " + b);

}

}