B5 Day 18 encapsulation

//imagine eto yugn main file
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Day18Password callPass = new Day18Password();
        String txtIn = "";
        String txtOut = "";
        boolean encrypt = true;

        System.out.print("Enter text >> ");
        txtIn = sc.nextLine();
        System.out.print("encrypt(true/false) >> ");
        encrypt = sc.nextBoolean();

        callPass.setTxtIn(txtIn);
        callPass.setEncrypt(encrypt);
        txtOut = callPass.getTxtOut();

        System.out.println("encrypted: " + txtOut);
    }
}

//--------------------------------
//eto yung isa pang file
//encapsulation sample
public class Day18Password { //BURAHIN NYO YUNG public KUNG GUSTO NYO ITO GAWIN SA ISANG FILE LANG
    private String txtIn = "";
    private String txtOut = "";
    private boolean encrypt;

    public void setTxtIn(String txtIn) {
        this.txtIn = txtIn;
    }
    public void setEncrypt(boolean encrypt) {
        this.encrypt = encrypt;
    }
    public String getTxtOut() {
        txtOut = caesarCipher(txtIn, encrypt);
        return txtOut;
    }

    private String caesarCipher(String txtIn, boolean encrypt){
        String txtOut = "";
        int increment = 2;
        if (encrypt == false) {
            increment = -2;
        }

        char txtArray[] = txtIn.toCharArray();
        for (char c : txtArray) {
            c += increment;
            txtOut += c;
        }
        return txtOut;
    }
}