Swap two strings without third variable in java| Core java programming interview Q

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How to swap two string in java| Core java interview questions and answers|Java programming interview questions

This is one of the important core java interview questions in strings.
Here tricky part is swapping two string without using third variable. Swapping two numbers without using temp variable is straight forward,there we can use addition and subtraction but in string we cannot apply those arithmetic operations, so we need to go for alternate string methods to achieve this feature.

We use string substring method to achieve this.

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