Belajar GUI

Nama: Azka Rizqullah Ramadhani

NRP: 5025231148

Kelas: Pemrograman Berbasis Objek (A)

1. Membuat Form login dengan GUI

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

public class LoginFrame {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Login Form");
        frame.setSize(350, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        frame.add(panel);
        placeComponents(panel);

        frame.setVisible(true);
    }

    private static void placeComponents(JPanel panel) {
        panel.setLayout(null);

        JLabel userLabel = new JLabel("Username:");
        userLabel.setBounds(10, 20, 80, 25);
        panel.add(userLabel);

        JTextField userText = new JTextField(20);
        userText.setBounds(100, 20, 165, 25);
        panel.add(userText);

        JLabel passwordLabel = new JLabel("Password:");
        passwordLabel.setBounds(10, 50, 80, 25);
        panel.add(passwordLabel);

        JPasswordField passwordText = new JPasswordField(20);
        passwordText.setBounds(100, 50, 165, 25);
        panel.add(passwordText);

        JButton loginButton = new JButton("Login");
        loginButton.setBounds(10, 80, 80, 25);
        panel.add(loginButton);

        JButton exitButton = new JButton("Exit");
        exitButton.setBounds(180, 80, 80, 25);
        panel.add(exitButton);

        loginButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String username = userText.getText();
                String password = new String(passwordText.getPassword());

                if ("admin".equals(username) && "password123".equals(password)) {
                    JOptionPane.showMessageDialog(panel, "Login Berhasil!");
                } else {
                    JOptionPane.showMessageDialog(panel, "Username atau Password salah!", "Error", JOptionPane.ERROR_MESSAGE);
                }
            }
        });

        exitButton.addActionListener(e -> System.exit(0));
    }
}

Github

2. Membuat Image Viewer dengan GUI

Class ImageViewer

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 main(String[] args) {
        JFrame frame = new JFrame("Image Viewer");
        frame.setSize(800, 600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        frame.add(panel);

        JLabel imageLabel = new JLabel("", SwingConstants.CENTER);
        panel.add(imageLabel, BorderLayout.CENTER);

        JButton loadButton = new JButton("Load Image");
        panel.add(loadButton, BorderLayout.SOUTH);

        loadButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser fileChooser = new JFileChooser();
                fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
                fileChooser.setDialogTitle("Select an Image");
                
                fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
                    @Override
                    public boolean accept(File f) {
                        if (f.isDirectory()) return true;
                        String name = f.getName().toLowerCase();
                        return name.endsWith(".jpg") || name.endsWith(".png") || name.endsWith(".gif");
                    }

                    @Override
                    public String getDescription() {
                        return "Image Files (*.jpg, *.png, *.gif)";
                    }
                });
                
                int result = fileChooser.showOpenDialog(frame);
                if (result == JFileChooser.APPROVE_OPTION) {
                    File selectedFile = fileChooser.getSelectedFile();
                    ImageIcon imageIcon = new ImageIcon(selectedFile.getAbsolutePath());
                    
                    Image image = imageIcon.getImage();
                    Image resizedImage = image.getScaledInstance(imageLabel.getWidth(), imageLabel.getHeight(), Image.SCALE_SMOOTH);
                    imageLabel.setIcon(new ImageIcon(resizedImage));
                }
            }
        });
        
        frame.setVisible(true);
    }
}

Github