string manipulation in java part 1: reverse a string

In these series, I'll try to provide code fragments for daily problems in string manipulation. First, we will see how to reverse a string. Note that there are -naturally- more than one way to do this.

public class StringUtils {
 public static String reverseString(String string){
/*
Check if the string is not null and empty
*/

  if(string != null && !string.isEmpty()){

/*
Create a StringBuilder from the string in hand
*/

   StringBuilder str = new StringBuilder(string);

/*
Reverse the StringBuilder content and return it as a String
*/

   return str.reverse().toString();
  }
  return null;
 }
 
 public static void main(String[] args){
  System.out.println(StringUtils.reverseString("I am your father"));
 }
}

Output is "rehtaf ruoy ma I".
It is possible to use StringBuffer instead of StringBuilder. As I don't need thread safety I'll pick StringBuilder which's faster. Quite easy to reverse a string, right?

listen to free music online

I talked about justhearit which's a music streaming service. Grooveshark is a great alternative to justhearit. The design of the website and the music archive are awesome. Check it!

change your status in multiple social networks

You can change your status in multiple social networking websites (facebook, myspace, twitter, plurk, linkedin, tumblr, hi5, plaxo ) using quub. Quite practical for those who actively use multiple networking websites.