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 &gt;=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();