Reverse a string in Java

Question

I have \"Hello World\" kept in a String variable named hi.

I need to print it, but reversed.

How can I do this? I understand there

Answer 1

1. Using Character Array:

public String reverseString(String inputString) {
    char[] inputStringArray = inputString.toCharArray();
    String reverseString = "";
    for (int i = inputStringArray.length - 1; i >= 0; i--) {
        reverseString += inputStringArray[i];
    }
    return reverseString;
}

2. Using StringBuilder:

public String reverseString(String inputString) {
    StringBuilder stringBuilder = new StringBuilder(inputString);
    stringBuilder = stringBuilder.reverse();
    return stringBuilder.toString();
}

OR

return new StringBuilder(inputString).reverse().toString();