How to reverse a string in Java

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There are two approaches to reverse a string in java

1) Use the StringBuffer class

StringBuffer provides a reverse method to do the job

[code language=”java”]

public class ReverseString
public static void main(String args[])
StringBuffer buff = new StringBuffer("Hello World");

2) Use charAt(int i) method of String class

Use the charAt method to extract characters from the string and append in the reverse order to reverse the input string.