How to reverse a String in Java

In this post, I will demonstrate how to reverse a String in Java. You can do this in the most obvious way i.e. iterating through the String in the reverse order and creating a new String. The following code snippet demonstrates this:

 

private static String reverse(String str){String reversedString = "";for(int i = str.length()-1;i >=0 ; i--){reversedString = reversedString + str.charAt(i);}return reversedString;}

 

A better way is to use Java’s StringBuilder class that has an in-built reverse method. The following code snippet demonstrates this:

 

StringBuilder strBuilder = new StringBuilder(str);String reversedString = strBuilder.reverse().toString();

 

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