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CaesarsCipher.java
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CaesarsCipher.java
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package Crypto;
import java.util.Scanner;
public class CaesarsCipher {
public static void main(String[] args) {
int type=0;
System.out.println("Program to Perform Caesar\'s Cipher Algorithm\n---");
Scanner sm = new Scanner(System.in);
System.out.println("Enter the word. (Do not use Spaces or Special Characters): ");
String input = sm.nextLine();
System.out.println("Enter 0 for Encode or 1 for Decode.");
type= sm.nextInt();
if (type<0 || type>1) {
System.out.println("Invalid Operator!");
end();
}
System.out.println("Output: "+caesarCipher(input, type));
end();
}
private static String caesarCipher(String input, int type) {
int value = 0;
String output = "";
if (type==0) {
for(int i = 0; i<input.length(); i++) {
value = input.charAt(i);
value +=3;
output +=Character.toString ((char) value);
}
}
else {
for(int i = 0; i<input.length(); i++) {
value = input.charAt(i);
value -=3;
output +=Character.toString ((char) value);
}
}
return output;
}
private static void end() {
System.out.println("---\nThe Program has ended");
System.exit(0);
}
}