Simple Encription

import java.util.Scanner;

//main
public class MyFirst{
public static void main(String[] args){


    int selection = 0;
    System.out.println("Would you like to make an encryption or decryption?\n1 - Encryption\n"
            + "2 = Decrypton");

    try{
    Scanner user = new Scanner(System.in);
    selection = user.nextInt();
    }
    catch(Exception e){
        e.getMessage();

    }

    if(selection == 1){
        Encrypt encrypt = new Encrypt();

    }
    else if(selection == 2){
        Decrypt decrypt = new Decrypt();
    }
    else {
        System.out.println("Error!");
    }

    }
}

//Encryption class

public class Encrypt {

    private char[] crypt;
    private String userInput;
    private String FinalEncrypt;
    private int int1 = 2;


    public Encrypt(){
        System.out.println("Enter a string you would like encrypted: ");
        Scanner ui = new Scanner(System.in);
        userInput = ui.nextLine();

        crypt = userInput.toCharArray(); // convert string to array

        //goes through each char and adds to it, putting it in to a new array
        for(int i = 0; i < crypt.length; i++){
            crypt[i] = (char)(crypt[i] + int1);
            int1 += int1 + 2;
          }
        FinalEncrypt = new String(crypt);
        System.out.println("Encryption: " + FinalEncrypt);

    }

}

//Decryption class

public class Decrypt {

    private char[] crypt;
    private String userInput;
    private String FinalEncrypt;
    private int int1 = 2;

    public Decrypt(){
        System.out.println("Enter a string you would like decrypted: ");
        Scanner ui = new Scanner(System.in);
        userInput = ui.nextLine();

        crypt = userInput.toCharArray(); // convert string to array

        //goes through each char and adds to it, putting it in to a new array
        for(int i = 0; i < crypt.length; i++){
            crypt[i] = (char)(crypt[i] - int1);
            int1 += int1 + 2;
          }
        FinalEncript = new String(crypt);
        System.out.println("Decrypted text: " + FinalEncrypt);
    }
}