Java Programs Made Easy

Q)...Find the extension of a given string file.
input: "hello.jpeg"
output: "jpeg"

1. package Set1;
2. import java.util.*;
3. public class ClassSet21 {
4.  public static String extensionString(String s1){
5.   StringTokenizer t=new StringTokenizer(s1,".");
6.   t.nextToken();
7.   String s2=t.nextToken();
8.   return s2;
9.  }
10.  public static void main(String[] args) {
11.   String s1="hello.jpeg";
12.   System.out.println(extensionString(s1));
13.  }
14. }