Java Programming

Q)..GIVEN A STRING 555-666-1234

DISPLAY AS 55-56-661-234?

1. package Set1;
2. import java.util.StringTokenizer;
3. public class ClassSet39 {
4. public static void main(String[] args) {
5.       String s="555-666-1234";
6.       System.out.println(display(s));
7.       }
8. public static String display(String s) {
9.       StringTokenizer t=new StringTokenizer(s,"-");
10.       String s1=t.nextToken();
11.       String s2=t.nextToken();
12.       String s3=t.nextToken();
13.            
14.       StringBuffer sb=new StringBuffer();
15.       sb.append(s1.substring(0, s1.length()-1)).append('-');
16.       sb.append(s1.charAt(s1.length()-1)).append(s2.charAt(0)).append('-');
17.       sb.append(s2.substring(1, s2.length())).append(s3.charAt(0)).append('-');
18.       sb.append(s3.substring(1, s3.length()));
19.      
20.       return sb.toString();
21. }
22. }