How Do You Reverse a String Using StringBuilder in Java?

Create a StringBuilder Object:

First, create a StringBuilder object and pass the string you want to reverse to it.

StringBuilder sb = new StringBuilder("Hello");

Use the reverse() Method:

Call the reverse() method on the StringBuilder object.

sb.reverse();

Convert Back to String (if needed):

If you need the reversed string as a String object, use the toString() method.

String reversedString = sb.toString(); 
System.out.println(reversedString); // Output: "olleH"

Example Code:

public class ReverseStringExample { 
public static void main(String[] args) { 
StringBuilder sb = new StringBuilder("Java"); 
sb.reverse(); S
ystem.out.println(sb.toString()); // Output: "avaJ" 
} 
}

Important Considerations:

• StringBuilder is mutable, so it directly modifies the original object without creating new ones, making it more memory-efficient for operations like reversing strings.
• This method is ideal when you need to reverse a string multiple times or perform other modifications.