Tugas Pertemuan 14 PBO

Nama  : Moh. Rizky Rahmadian Makkani

NRP    : 5025231035

Kelas : PBO A

Tugas Pertemuan 14 : PBO

1. Membuat frame windows user login dan password.

Code LoginWindow.java :

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class LoginWindow {
    public static void main(String[] args) {
        // Membuat frame
        JFrame frame = new JFrame("Login");
        frame.setSize(300, 150);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new GridLayout(3, 2, 5, 5));

        // Komponen GUI
        JLabel usernameLabel = new JLabel("Username:");
        JTextField usernameField = new JTextField();
        JLabel passwordLabel = new JLabel("Password:");
        JPasswordField passwordField = new JPasswordField();
        JButton loginButton = new JButton("Login");
        JButton cancelButton = new JButton("Cancel");

        // Tambahkan komponen ke frame
        frame.add(usernameLabel);
        frame.add(usernameField);
        frame.add(passwordLabel);
        frame.add(passwordField);
        frame.add(loginButton);
        frame.add(cancelButton);

        // Event handling untuk tombol login
        loginButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String username = usernameField.getText();
                String password = new String(passwordField.getPassword());

                // Validasi login
                if (username.equals("admin") && password.equals("12345")) {
                    JOptionPane.showMessageDialog(frame, "Login Berhasil!");
                    frame.dispose(); // Tutup jendela login
                    ImageViewer.showImageViewer(); // Panggil aplikasi Image Viewer
                } else {
                    JOptionPane.showMessageDialog(frame, "Login Gagal. Periksa username atau password.");
                }
            }
        });

        // Event handling untuk tombol cancel
        cancelButton.addActionListener(e -> frame.dispose());

        // Tampilkan frame
        frame.setLocationRelativeTo(null); // Pusatkan layar
        frame.setVisible(true);
    }
}

Output :

Output ketika salah memasukkan Username/Password :

Output ketika Username/Password yang dimasukkan benar :

2. Implementasikan aplikasi image viewer.

Code ImageViewer.java :

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

public class ImageViewer {
    public static void showImageViewer() {
        // Membuat frame
        JFrame frame = new JFrame("Image Viewer");
        frame.setSize(600, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());

        // Komponen GUI
        JLabel imageLabel = new JLabel("No Image Selected", SwingConstants.CENTER);
        imageLabel.setFont(new Font("Arial", Font.BOLD, 16));
        imageLabel.setHorizontalAlignment(SwingConstants.CENTER);
        JButton openButton = new JButton("Open Image");

        // Tambahkan komponen ke frame
        frame.add(imageLabel, BorderLayout.CENTER);
        frame.add(openButton, BorderLayout.SOUTH);

        // Event handling untuk tombol "Open Image"
        openButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // Dialog file chooser
                JFileChooser fileChooser = new JFileChooser();
                fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
                fileChooser.setFileFilter(new javax.swing.filechooser.FileNameExtensionFilter(
                        "Image Files", "jpg", "jpeg", "png", "gif"));

                int result = fileChooser.showOpenDialog(frame);
                if (result == JFileChooser.APPROVE_OPTION) {
                    File selectedFile = fileChooser.getSelectedFile();
                    ImageIcon imageIcon = new ImageIcon(selectedFile.getAbsolutePath());
                    Image scaledImage = imageIcon.getImage().getScaledInstance(
                            imageLabel.getWidth(), imageLabel.getHeight(), Image.SCALE_SMOOTH);
                    imageLabel.setIcon(new ImageIcon(scaledImage));
                    imageLabel.setText(""); // Hapus teks placeholder
                }
            }
        });

        // Tampilkan frame
        frame.setLocationRelativeTo(null); // Pusatkan layar
        frame.setVisible(true);
    }
}

Output :