StringUtils.java

package com.radicaldynamic.groupinform.utilities;

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

public class StringUtils
{
    public static String getMD5(String input) 
    {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] messageDigest = md.digest(input.getBytes());
            
            BigInteger number = new BigInteger(1, messageDigest);
            String hashtext = number.toString(16);
            
            // Now we need to zero pad it if you actually want the full 32 chars.
            while (hashtext.length() < 32) {
                hashtext = "0" + hashtext;
            }
            
            return hashtext;            
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws NoSuchAlgorithmException 
    {
        System.out.println(getMD5("Javarmi.com"));
    }

    public static String join(String[] a, String separator, int limit) 
    {
        StringBuffer result = new StringBuffer();

        if (a.length > 0) {
            result.append(a[0]);

            for (int i = 1; i < a.length && i < limit; i++) {
                result.append(separator);
                result.append(a[i]);
            }
        }

        return result.toString();
    }
    
    public static String ucfirst(String s)
    {
        return s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase();
    }
}