import java.util.*; public class Main public static boolean isALetter (char letter){ if( (letter = 'a' && letter <= 'z') || (letter >= 'A' && letter = 'Z')) return true; return false; public static int putkeyInRange (int encryptKey){ int num; if(encryptKey>=-32767 && encryptKey<=32767){ num= (encryptKey%26)+1; return num; System.out.println("Invlaid input key :"); return -1; public static char encode (char letter, int encryptKey){ return (char) ((int)letter+encryptKey); public static char decode (char letter, int encryptKey){ return (char) (C(int)letter-encryptKey); public static void main(String[] args) { Scanner sc-new Scanner (System.in); System.out.print("Enter a message: "): String m-sc.nextLine (); System.out.print("Enter a Key:"); int key=sc.nextInt(); String encryptMessage="; String decryptmessage=""; int encryptKey=putKeyInRange (key); //encryption process for(int i-0;i

import java.util.*; public class Main public static boolean isALetter (char letter){ if( (letter = 'a' && letter <= 'z') || (letter >= 'A' && letter = 'Z')) return true; return false; public static int putkeyInRange (int encryptKey){ int num; if(encryptKey>=-32767 && encryptKey<=32767){ num= (encryptKey%26)+1; return num; System.out.println("Invlaid input key :"); return -1; public static char encode (char letter, int encryptKey){ return (char) ((int)letter+encryptKey); public static char decode (char letter, int encryptKey){ return (char) (C(int)letter-encryptKey); public static void main(String[] args) { Scanner sc-new Scanner (System.in); System.out.print("Enter a message: "): String m-sc.nextLine (); System.out.print("Enter a Key:"); int key=sc.nextInt(); String encryptMessage="; String decryptmessage=""; int encryptKey=putKeyInRange (key); //encryption process for(int i-0;i

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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