SwingWorker的工作不

Question

我有以下代碼：

import javax.swing.*; 
import java.awt.event.*; 
import java.util.List; 
import java.util.concurrent.Executor; 
import java.util.concurrent.Executors; 
public class KaraokeMachine extends JFrame implements ActionListener 
{ 
ClassLoader Idr = this.getClass().getClassLoader(); 
java.applet.AudioClip everythingIsAwesome = JApplet.newAudioClip(Idr.getResource("everything is awesome.wav")); 
JLabel lbl1 = new JLabel(""); 
JButton btn = new JButton("Play"); 
JPanel pnl = new JPanel(); 
final Executor executor = Executors.newCachedThreadPool(); 

public KaraokeMachine() 
{ 
    super("Karaoke"); 
    setSize(520, 280); 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    pnl.add(lbl1); 
    pnl.add(btn); 
    btn.addActionListener(this); 
    add(pnl); setVisible(true); 
} 

public void actionPerformed(ActionEvent event) 
{ 
    if (event.getSource() == btn) 
    { 
      SwingWorker<Void, String> worker = new SwingWorker<Void, String>() 
      { 
       @Override 
       protected Void doInBackground() throws Exception 
       { 
        everythingIsAwesome.play(); 
        this.publish("Everything"); 
        Thread.sleep(600); 
        this.publish("Everything is"); 
        Thread.sleep(400); 
        this.publish("Everything is Awesome!"); 
        Thread.sleep(2000); 
        this.publish("Everything"); 
        Thread.sleep(600); 
        this.publish("Everything is"); 
        Thread.sleep(400); 
        this.publish("Everything is cool"); 
        Thread.sleep(400); 
        this.publish("Everything is cool when"); 
        Thread.sleep(400); 
        this.publish("Everything is cool when you're"); 
        Thread.sleep(400); 
        this.publish("Everything is cool when you're part"); 
        Thread.sleep(150); 
        this.publish("Everything is cool when you're part of"); 
        Thread.sleep(150); 
        this.publish("Everything is cool when you're part of a"); 
        Thread.sleep(150); 
        this.publish("Everything is cool when you're part of a team"); 
        Thread.sleep(1000); 
        this.publish("Everything"); 
        Thread.sleep(600); 
        this.publish("Everything is"); 
        Thread.sleep(400); 
        this.publish("Everything is Awesome!"); 
        Thread.sleep(1500); 
        this.publish("When"); 
        Thread.sleep(300); 
        this.publish("When you're"); 
        Thread.sleep(300); 
        this.publish("When you're livin'"); 
        Thread.sleep(300); 
        this.publish("When you're livin' in"); 
        Thread.sleep(300); 
        this.publish("When you're livin' in a"); 
        Thread.sleep(300); 
        this.publish("When you're livin' in a dream!"); 
        Thread.sleep(300); 
        return null; 
       } 
      @Override 
      protected void process(List<String> res) 
      { 
       for(String text : res) 
       { 
        lbl1.setText(text); 
       } 
       } 
     }; 
     executor.execute(worker); 
    } 
} 
public static void main(String[] args) 
{ 
    KaraokeMachine karaoke = new KaraokeMachine(); 
} 

}

當我使之成爲一個類文件這一點，它工作正常，但是當我把它變成一個罐子文件，我得到以下錯誤：

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDegFoundError: KaraokeMachine$1

有誰知道如何更改代碼，以便swingworker在jar文件中工作？

Answer 1

該異常意味着某些可疑內部類在您的類路徑中缺失。所以最有可能的答案是：當你將你的班級「捆綁」到該班級文件中時，你可以將忘記爲，這些班級可以命名爲A$1.class。

KaraokeMachine.class是 「主」 類，但在這裏：

SwingWorker<Void, String> worker = new SwingWorker<Void, String>() { 

要創建一個匿名內部類 - 它進入KaraokeMachine $ 1.class。爲了運行你的應用程序，你需要所有這些類文件存在。

換句話說：您的JAR文件的內容不完整。仔細看看你的如何構建那個JAR文件。例如，請參閱here。