Swing中的进度对话框

import javax.swing.*;

public class ProgressDialogDemo {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            JProgressBar progressBar = new JProgressBar();
            JOptionPane.showMessageDialog(null, progressBar, "正在处理中...", JOptionPane.PLAIN_MESSAGE);
            for (int i = 0; i < 100; i++) {
                progressBar.setValue(i);
                try {
                    Thread.sleep(50);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}