How to reverse a string

Question

I need to reverse the string of a user's input.

I need it done in the simplest of ways. I was trying to do reverseOrder(UserInput) but it wasn't working.

For example, user inputs abc I just take the string and print out cba

Answer 1

new StringBuilder(str).reverse().toString()

java.util.Collections.reverseOrder is for sorting in reverse of normal order.

Answer 2

I prefer using Apache's commons-lang for this kind of thing. There are all kinds of goodies, including:

StringUtils.reverse("Hello World!");

yields: !dlroW olleH

StringUtils.reverseDelimited("Hello World!", ' ');

yields: World! Hello

Answer 3

If you are new to programming, which I guess you are, my suggestion is "Why use simple stuff?". Understand the internals and play some!!

public static void main(String[] args) {
String str = "abcasz";
char[] orgArr = str.toCharArray();
char[] revArr = new char[orgArr.length];
for (int i = 0; i < orgArr.length;i++)  {
revArr[i] = orgArr[orgArr.length - 1 - i];
}
String revStr = new String(revArr);
System.out.println(revStr);