如何自动关闭JOptionPane？

我有一个Thread正在运行，当thread工作时我想显示一个JOptionPane.showMessageDialog说应用程序正在工作，并且在线程停止后， JOptionPane将自动关闭， OK按钮将一直被停用。 我的主要代码：

 class Index { public static void main(String args[]) { NewThread ob1 = new NewThread("One"); NewThread ob2 = new NewThread("Two"); NewThread ob3 = new NewThread("Three"); System.out.println("Thread One is alive: "+ ob1.t.isAlive()); System.out.println("Thread Two is alive: "+ ob2.t.isAlive()); System.out.println("Thread Three is alive: "+ ob3.t.isAlive()); while (ob1.t.isAlive()){ JOptionPane.showMessageDialog(null,"Thread One is alive"); } System.out.println("Thread One is alive: "+ ob1.t.isAlive()); System.out.println("Thread Two is alive: "+ ob2.t.isAlive()); System.out.println("Thread Three is alive: "+ ob3.t.isAlive()); System.out.println("Main thread exiting."); }} 

当我运行JOptionPane显示器时，除非我按下OK按钮，否则他不会自动关闭。

 class NewThread implements Runnable { String name; Thread t; NewThread(String threadname) { this.name = threadname; this.t = new Thread(this, name); System.out.println("New thread: " + t); this.t.start(); // Start the thread } public void run() { try { for(int i = 5; i > 0; i--) { System.out.println(name + ": " + i); Thread.sleep(1000); } } catch (InterruptedException e) { System.out.println(name + " interrupted.");} System.out.println(name + " exiting."); }} 

Answer 1

• 创建自己的Dialog没有任何按钮…确保将defaultCloseOperation设置为DO_NOTHING
• 使用ProgressMonitor

ProgressMonitor示例……

 import java.awt.BorderLayout; import java.awt.EventQueue; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import javax.swing.JFrame; import javax.swing.ProgressMonitor; import javax.swing.SwingWorker; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class TestProgress { public static void main(String[] args) { new TestProgress(); } public TestProgress() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } new BackgroundWorker().execute(); } }); } public class BackgroundWorker extends SwingWorker { private ProgressMonitor monitor; public BackgroundWorker() { addPropertyChangeListener(new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent evt) { if ("progress".equalsIgnoreCase(evt.getPropertyName())) { if (monitor == null) { monitor = new ProgressMonitor(null, "Processing", null, 0, 99); } monitor.setProgress(getProgress()); } } }); } @Override protected void done() { if (monitor != null) { monitor.close(); } } @Override protected Void doInBackground() throws Exception { for (int index = 0; index < 100; index++) { setProgress(index); Thread.sleep(125); } return null; } } } 

对话框示例

 import java.awt.EventQueue; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import javax.swing.JDialog; import javax.swing.JLabel; import javax.swing.JProgressBar; import javax.swing.SwingWorker; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class TestProgress { public static void main(String[] args) { new TestProgress(); } public TestProgress() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } new BackgroundWorker().execute(); } }); } public class BackgroundWorker extends SwingWorker { private JProgressBar pb; private JDialog dialog; public BackgroundWorker() { addPropertyChangeListener(new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent evt) { if ("progress".equalsIgnoreCase(evt.getPropertyName())) { if (dialog == null) { dialog = new JDialog(); dialog.setTitle("Processing"); dialog.setLayout(new GridBagLayout()); dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE); GridBagConstraints gbc = new GridBagConstraints(); gbc.insets = new Insets(2, 2, 2, 2); gbc.weightx = 1; gbc.gridy = 0; dialog.add(new JLabel("Processing..."), gbc); pb = new JProgressBar(); gbc.gridy = 1; dialog.add(pb, gbc); dialog.pack(); dialog.setLocationRelativeTo(null); dialog.setVisible(true); } pb.setValue(getProgress()); } } }); } @Override protected void done() { if (dialog != null) { dialog.dispose(); } } @Override protected Void doInBackground() throws Exception { for (int index = 0; index < 100; index++) { setProgress(index); Thread.sleep(125); } return null; } } } 

Answer 2

  JOptionPane msg = new JOptionPane("Mensagem de advertência", JOptionPane.WARNING_MESSAGE); final JDialog dlg = msg.createDialog("Advertência"); dlg.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE); new Thread(new Runnable() { @Override public void run() { try { Thread.sleep(5000); } catch (InterruptedException e) { e.printStackTrace(); } dlg.setVisible(false); } }).start(); dlg.setVisible(true);