Utility.java

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("");
        
    }
    
}