The following packages need to be imported:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.math.BigInteger;

public String createMD5Hash (String token) {
 
    	String s = token;
    	MessageDigest m;
    	String returnstring = null;
    	try {
    		m = MessageDigest.getInstance("MD5");
    		m.update(s.getBytes(),0,s.length());
    		returnstring = new BigInteger(1,m.digest()).toString(16);
    		System.out.println("MD5: "+ returnstring);
    	} catch (NoSuchAlgorithmException e) {
 
    		e.printStackTrace();
    	}
 
    	return returnstring;
 
    }