显示一会儿 JWindow

Question

我想在 JWindow 中显示一条消息一段时间，所以我尝试使用 while（） 和 sleep（） 函数，但它不起作用。这是应该调用 JWindow （ 消息窗口 ） 的函数。有没有其他方法可以显示此窗口 2 秒钟？

private void showJWindow() {
    boolean flag = true;
    final MessageWindow window = new MessageWindow( playerName, playerInAction );
    window.setVisible( true );
    try {
        synchronized( window ) {
            while( flag ) {
                window.wait( 3000 );
                flag = false;
                window.setVisible( false );
            }
        }
    } catch( InterruptedException ie ) {
        Thread.currentThread().interrupt();
    }
}

Answer 1

下面是一个使用 Swing 计时器的简短示例。

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
public class TestGUI {
    public TestGUI() {
        final JFrame frame = new JFrame("Test");
        JButton press = new JButton("Press Me");
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.add(press);
        press.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                final JDialog dialog = new JDialog();
                dialog.add(new JLabel("Here for 2 seconds"));
                dialog.pack();
                dialog.setLocationRelativeTo(null);
                dialog.setVisible(true);
                Timer timer = new Timer(2000, new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        dialog.setVisible(false);
                        dialog.dispose();
                    }
                });
                timer.setRepeats(false);
                timer.start();
            }
        });
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new TestGUI();
            }
        });
    }
}

Answer 2

这是我

为另一个项目整理的一个类。它更接近您要查找的内容：

public class Splash extends JWindow implements Runnable
{
  private static final long serialVersionUID = -3945334716967506918L;
  public void run()
  {
  showSplash(10000);
  }
 private void showSplash(int duration)
 {
  JPanel content = (JPanel)getContentPane();
  //Set the windows bounds, centering the window
  int width = 558;
  int height = 430;
  Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
  int x = (screen.width-width)/2;
  int y = (screen.height-height)/2;
  setBounds(x,y,width,height);
  //build the splash screen
  //SPECIAL NOTE: WHEN ADDING A NEW IMAGE TO THE PROJECT, REFRESH ECLIPSE 
  //WITH F5 SO THAT THE FILE GETS RECOGNIZED. OTHERWISE YOU'LL GET NULLPOINTEREXCEPTION.
  JLabel label = new JLabel (new ImageIcon(getClass().getResource("data/images/World_Magnifier_Splash.jpg")));
  JLabel copyrt = new JLabel("Copyright 2012, Tactical Enterprises Ltd.", JLabel.CENTER);
  copyrt.setFont(new Font("Sans-Serif", Font.BOLD, 12));
  content.add(label, BorderLayout.CENTER);
  content.add(copyrt, BorderLayout.SOUTH);
  content.setBorder(BorderFactory.createLineBorder(Color.BLACK, 5));
  //display
  setVisible(true);
  try
  {
     Thread.sleep(duration);
  }
  catch(Exception e){}
  setVisible(false);
  }
}

您可以通过创建线程在 main 方法中运行它，如下所示：

Thread t = new Thread(new Splash());
t.start();

希望这有帮助。

Answer 3

尝试使用 JDialog 而不是 JWindow。下面的代码显示了 3 秒钟的对话框。

public static void main(String[] args) {
    JDialog dialog = new JDialog();
    dialog.getContentPane().add(new JLabel("test"));
    dialog.pack();
    dialog.setVisible(true);
    try {
        Thread.sleep(3000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    dialog.setVisible(false);
}