定時器配置jFrame並填充進度條

Question

我是一名初學者，當我運行我的程序（即，當父jFrame出現時）時啓動一個計時器並在5秒後處置該幀。當計時器啓動時，我想開始填充虛擬進度條，並完全填充它，直到計時器熄滅。

Answer 1

這裏是你的代碼

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.WindowEvent; 
public class ClosingPanel extends JFrame{ 
private final Timer every50millis; 

public ClosingPanel() { 
    setTitle("this panel will self-destruct"); 
    setDefaultCloseOperation(DISPOSE_ON_CLOSE); 
    final JProgressBar progressBar = new JProgressBar(SwingConstants.HORIZONTAL, 0, 100); 
    add(progressBar); 
    pack(); 
    every50millis = new Timer(50, new ActionListener() { 
     private int count=0; 
     @Override 
     public void actionPerformed(ActionEvent e) { 
      count++; 
      progressBar.setValue(count); 
      if (count==100) { 
       shutdown(); 
      } 
     } 
    }); 
    every50millis.start(); 
} 

private void shutdown() { 
    System.err.println("shutting down"); 
    every50millis.stop(); 
    WindowEvent closingEvent = new WindowEvent(ClosingPanel.this, WindowEvent.WINDOW_CLOSING); 
    Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(closingEvent); 
} 

public static void main(String[] args) throws Exception { 
    SwingUtilities.invokeAndWait(new Runnable() { 
     @Override 
     public void run() { 
      ClosingPanel panel = new ClosingPanel(); 
      panel.setVisible(true); 
     } 
    }); 
} 

}