Encrypter #1

import java.io.*;
/**
 * Salamencizoric code is where 'A' becomes 'Z', 'B' becomes 'Y' and so on.
 * I thank my friends from the Tech & Code room for helping me to shorten this program.
 * @author Salamencizer
 * @version 6/14/2015
 */
class o_O /*Credits to xfix for the class name*/
{
    public static void main()throws IOException
    {
        InputStreamReader read = new InputStreamReader(System.in);
        BufferedReader in = new BufferedReader(read);
        boolean baba=false;
        long shut_up=1;
        do
        {
            String sent="",cord="";
            System.out.print("\u000c");
            System.out.println("-----------------------------------------------------");
            System.out.println("Welcome to the code generator. What do you wanna do? |");
            System.out.println("-----------------------------------------------------");
            System.out.println(" ---->Transform a sentence to a code\tEnter transform");
            System.out.println("");
            System.out.println(" ---->Decode a code sentence        \tEnter Decode");
            System.out.println("");
            char wtd= ((in.readLine()).toUpperCase()).charAt(0);
            if(wtd=='T')
            {
                System.out.println("Enter the sentence to be transformed. (EVERTHING MUST BE CAPS)");
                sent=in.readLine();
                cord=encrypt(sent);
                System.out.println(" *****Transformation completed!! The code is: *****");
                System.out.println(cord);
            }
            else if(wtd=='D')
            {
                System.out.println("Enter the sentence to be decoded. (EVERTHING MUST BE CAPS)");
                sent=in.readLine();
                cord=encrypt(sent);
                System.out.println(" *****Decoding completed!! The code is: *****");
                System.out.println(cord);
            }
            else
            {
                System.out.println("Sorry, enter something valid!!");
            }
            System.out.println("Repeat the program??\t\t\t    Y/N/y/n/yep/yeah/no/yes/nope/neva");
            char yn=in.readLine().charAt(0);
            if(yn=='Y'||yn=='y')
            {
                shut_up++;
                baba=true;
            }
            else
                baba=false;
            System.out.print("\u000c");
        }
        while(baba);
        System.out.println("You have used this program "+shut_up+" times.");
        System.out.println("Thanks for using this program.");
    }

    private static String encrypt(String senti)
    {
        String sent="";
        senti=senti.toUpperCase();
        char[] a=new char[26];
        char[] b=new char[26];int l=0;
        for(int i=0;i<26;i++)
            a[i]=(char)(i+65);
        for(int i=(int)'Z';i>=(int)'A';i--)
        {
            b[l]=(char)i;
            l++;
        }
        for(int i=0;i<senti.length();i++)
            if('A' <= senti.charAt(i) && senti.charAt(i) <= 'Z')
            {
                for(int j=0;j<=25;j++)
                    if(senti.charAt(i)==a[j])
                        sent=sent+b[j];
            }
            else
                sent=sent+senti.charAt(i);
        return sent;
    }
}