HashMD5 class

package javaapplication1;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
/**
 *
 * @author Suwandaru
 */
public class HashMD5 {

public String hash(String data){
    String hashed="";
    try{
        MessageDigest md5;
        md5=MessageDigest.getInstance("MD5");
        md5.update(data.getBytes());
        byte byteData[]=md5.digest();
        //convert byte to hex
        StringBuilder sb = new StringBuilder();
        for (int i=0;i<byteData.length;i++){
            sb.append(Integer.toString((byteData[i]&0xff)+0x100,16).substring(1));
        }
        hashed=sb.toString();
    }
    catch (NoSuchAlgorithmException e)
    {
        System.out.println(e.getMessage());
    }
    return hashed;
}
public String hashFile (String file) {
    String hashed = "";
    try {
        MessageDigest md=MessageDigest.getInstance("MD5");
        FileInputStream fs = new FileInputStream(file);
        byte[] dataBytes = new byte [1024];
        int nread=0;
        while ((nread=fs.read(dataBytes))!=-1){
            md.update(dataBytes,0,nread);
        }
        byte[] mdbytes=md.digest();
        //convert byte to hex
        StringBuilder sb=new StringBuilder();
        for (int i=0;i<mdbytes.length;i++){
        sb.append(Integer.toString((mdbytes[i]&0xff)+0x100,16).substring(1));
    }
        hashed=sb.toString();
    }catch (NoSuchAlgorithmException e)
    {
        System.out.println(e.getMessage());
    } catch (FileNotFoundException e){
        System.out.println(e.getMessage());
    } catch (IOException e){
        System.out.println(e.getMessage());
    }
    return hashed;
}
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        //using hash method to hash string
        HashMD5 md5 = new HashMD5();
        String msg = "Selamat datang di Java Message Digest";
        String hashed = md5.hash(msg);
        System.out.println("Message: "+msg);
        System.out.println("Hashing: "+hashed);

       //using hashFile method to hash file
        HashMD5 md52 = new HashMD5();
        String file = "C:/Users/Suwandaru/Downloads/Schedule IT RSC Project 2014 141124.xlsx";
        String fileHashed = md52.hashFile(file);
        System.out.println("File hashing: "+file);
        System.out.println("Hashing: "+fileHashed);

    }

}