1 import java.security.*;
    2 import java.math.*;
    3 
    4 public class MD5 {
    5    public static void main(String args[]) throws Exception{
    6       String s="This is a test";
    7       MessageDigest m=MessageDigest.getInstance("MD5");
    8       m.update(s.getBytes(),0,s.length());
    9       System.out.println("MD5: "+new BigInteger(1,m.digest()).toString(16));
   10    }
   11 }