在Java中创建对话框的最佳实战指南

import javax.swing.*;

public class SimpleDialogDemo {
    public static void main(String[] args) {
        JFrame mainWindow = new JFrame("主窗口");
        // 创建错误类型对话框
        JOptionPane.showMessageDialog(
            mainWindow,          // 父组件
            "这是一个错误提示",  // 提示内容
            "错误提示",          // 对话框标题
            JOptionPane.ERROR_MESSAGE // 图标类型
        );
        mainWindow.setSize(350, 350);
        mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mainWindow.setVisible(true);
    }
}

import javax.swing.*;
import java.awt.*;

public class CustomDialogDemo {
    public static void main(String[] args) {
        // 创建无标题对话框
        JDialog customDialog = new JDialog();
        customDialog.setTitle("自定义对话框");
        customDialog.setSize(400, 300);
        customDialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
        customDialog.setModal(false); // 允许与其他窗口交互
        customDialog.setLayout(new FlowLayout());
        
        // 添加自定义组件
        JLabel label = new JLabel("请输入您的姓名：");
        JTextField textField = new JTextField(20);
        JButton okButton = new JButton("确认");
        okButton.addActionListener(e -> {
            System.out.println("输入内容：" + textField.getText());
            customDialog.dispose();
        });
        
        customDialog.add(label);
        customDialog.add(textField);
        customDialog.add(okButton);
        customDialog.setVisible(true);
    }
}

JOptionPane.showMessageDialog(
    null, 
    "文件保存失败：路径无效", 
    "错误警告", 
    JOptionPane.ERROR_MESSAGE
);

int option = JOptionPane.showConfirmDialog(
    mainWindow, 
    "是否覆盖现有文件？", 
    "确认操作", 
    JOptionPane.YES_NO_OPTION
);
if (option == JOptionPane.YES_OPTION) {
    // 执行覆盖操作
}

JProgressBar progressBar = new JProgressBar(0, 100);
JOptionPane.showMessageDialog(
    null, 
    progressBar, 
    "文件上传中...", 
    JOptionPane.INFORMATION_MESSAGE, 
    null
);

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

SwingWorker<Void, Void> worker = new SwingWorker<>() {
    @Override
    protected Void doInBackground() {
        // 模拟耗时操作
        Thread.sleep(2000);
        return null;
    }
    
    @Override
    protected void done() {
        progressDialog.dispose();
        JOptionPane.showMessageDialog(mainWindow, "任务完成！");
    }
};
progressDialog.setVisible(true);
worker.execute();

JLabel accessibleLabel = new JLabel("用户名：");
accessibleLabel.getAccessibleContext().setAccessibleName("用户名输入框");
textField.getAccessibleContext().setAccessibleDescription("请输入您的用户名");