NetBeans中创建Java GUI应用的简单示例

本示例演示如何使用NetBeans IDE创建一个简单的Java GUI应用，通过按钮点击触发事件并显示相应的消息。

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

public class SimpleGUI extends JFrame {
    public SimpleGUI() {
        initComponents();
    }

    private void initComponents() {
        JButton btnClickMe = new JButton("点击我");
        btnClickMe.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "你点击了按钮！");
            }
        });

        GroupLayout layout = new GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGap(150, 150, 150)
                    .addComponent(btnClickMe)
                    .addContainerGap(150, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGap(100, 100, 100)
                    .addComponent(btnClickMe)
                    .addContainerGap(100, Short.MAX_VALUE))
        );

        pack();
    }

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new SimpleGUI().setVisible(true);
            }
        });
    }
}

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