请等待对话框

Question

我在Thread.Sleep方法中显示对话框时遇到问题这里是我的代码，它不起作用。

JButton btnNewButton = new JButton("New button");
btnNewButton.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent arg0) {
    JDialog loading = new LoadingDialog();
    loading.setVisible(true);
    try {
      Thread.sleep(6000);
    } catch (Exception e) {
      e.printStackTrace();
    }
    loading.dispose();
  }
});

和

public class LoadingDialog extends JDialog { 
  public LoadingDialog(){ 
    Toolkit tk = Toolkit.getDefaultToolkit(); 
    Dimension screenSize = tk.getScreenSize(); 
    int screenHeight = screenSize.height; 
    int screenWidth = screenSize.width; 
    setBounds((screenWidth-400)/2, (screenHeight-200)/2, 350, 80);
    getContentPane().setLayout(null);
    setResizable(false); 
    setUndecorated(true); 
    JLabel lblPleaseWaitWhile = new JLabel("Please wait while starting the services."); 
    lblPleaseWaitWhile.setBounds(85, 22, 313, 14); getContentPane().add(lblPleaseWaitWhile); 
    setVisible(true); 
  } 
}

帮我解决这个问题。

Answer 1

使用自定义对话框，您将阻止主线程 - 请尝试此操作;

btn.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent ae) {
    final JDialog loading = new LoadingDialog();
    loading.setVisible(true);
    btn.setEnabled(false);

    new Thread(new Runnable() {
      public void run() {
        try {
          Thread.sleep(6000);
        } catch (InterruptedException e) {
        }
        loading.dispose();
        btn.setEnabled(true);
      }
    }).start();
  }
});

Answer 2

在这种情况下，最好使用SwingWorker。此类允许您创建以后台模式运行的线程。它适用于模态框架。