ciip-grp8-password-manager/src/main/java/PasswordManager.java

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.Scanner;

public class PasswordManager implements PasswordManagerInterface {

    boolean running = true;
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;

    public static void main(String[] args) {
        PasswordManager pm = new PasswordManager();

        while (pm.running) {
            pm.showMenu(null, null);
        }
        System.exit(0);
    }

    public PasswordManager() {
        try {
            outputStream.write("Hello World\n".getBytes(StandardCharsets.UTF_8));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void listVaults() {

    }

    @Override
    public void openVault() {

    }

    @Override
    public void showMenu(InputStream inputStream, OutputStream outputStream) {
        if (inputStream == null) {
            inputStream = this.inputStream;
        }
        if (outputStream == null) {
            outputStream = this.outputStream;
        }

        StringBuilder sb = new StringBuilder();
        Scanner scan = new Scanner(inputStream);
        running = true;

        sb.append("ciip Gruppe 8 - Password Manager\n\n");

        sb.append("Menu:\n");
        sb.append("- exit: e\n");

        try {
            outputStream.write((sb + "\n").getBytes(StandardCharsets.UTF_8));
        } catch (IOException e) {
            e.printStackTrace();
        }

        String input = scan.nextLine();

        if (input.equals("e")) {
            running = false;
        }
    }
}