Java Assignment

import java.security.MessageDigest; public class Utility { public static String getHash(String base) { String message=""; try{ MessageDigest digest = MessageDigest.getInstance("SHA-256"); byte[] hash = digest.digest(base.getBytes("UTF-8")); StringBuffer hexString = new StringBuffer(); for (int i = 0; i < hash.length; i++) { String hex = Integer.toHexString(0xff & hash[i]); if(hex.length() == 1) hexString.append('0'); hexString.append(hex); } message = hexString.toString(); } catch(Exception ex){ throw new RuntimeException(ex); } return message; } public static void printLine(int num) { printLine(num,'-'); } public static void printDoubleLine(int num) { printLine(num,'='); } public static void printLine(int num,char pattern) { for(int i =0;i<num;i++) { System.out.print(pattern); } System.out.println(""); } }