Java tutorial
//package com.java2s; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Main { public static byte[] hash(String message) { MessageDigest cript = null; try { cript = MessageDigest.getInstance("SHA-1"); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); return null; } cript.reset(); try { cript.update(message.getBytes("utf8")); } catch (UnsupportedEncodingException e) { e.printStackTrace(); return null; } return cript.digest(); } }