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:

 

[java]

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

[/java]

 

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

 

[java]

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

[/java]