即使我发送的所有对象都是可序列化的，但得到一个NotSerializableException异常

Question

好吧，我有这个类扩展了JFrame，我基本上试图创建这个JPanel，它接收信息并发送一个“Event”对象按下Submit按钮。一切似乎都在工作，除了当我按下提交时，它告诉我我的客户端需要可序列化......（客户端类是一个基本的类，它打开一个连接到特定的端口。它的工作原理，我已经测试了它这不是问题）。我已将所有要发送的对象序列化。我不明白为什么我得到一个NotSerializableException。一直试图找出现在几个小时。任何有识之士将不胜感激。

这里是我的代码：

public class WindowGameActual extends JFrame implements ActionListener 
{ 
private final static int PORT = 11114; 

private GameState game; 

public WindowClient connection; 

JPanel container; 


JTextArea description; 
JTextField difficulty; 
JCheckBox check4; 
JCheckBox check6; 
JCheckBox check8; 
JCheckBox check12; 
JCheckBox check20; 

JCheckBox agl; 
JCheckBox str; 
JCheckBox mana; 


public class WindowClient extends Client 
{ 
    public WindowClient(String host) throws IOException 
    { 
     super(host, PORT); 
    } 


    protected void messageReceived(Object message) 
    { 
     if(message instanceof GameState) 
      { 
      game = (GameState) message; 
      container.repaint(); 
      } 

    } 
} //end WindowClient 


public WindowGameActual(String host) 
{ 

    setDefaultCloseOperation(EXIT_ON_CLOSE); 

    game = new GameState(); 

    try { 
     connection = new WindowClient(host); 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

    container = new JPanel(); 
    GridLayout gridC = new GridLayout(3, 1); 
    container.setLayout(gridC); 

    CurrentEventPanel curEvt = new CurrentEventPanel(game); 
    curEvt.updateEvent(game); 
    container.add(curEvt); 

//  ControlPanel eventControl = new ControlPanel(host); 
//  container.add(eventControl); 

    GridLayout outerPanel = new GridLayout(4, 1); 
    JPanel control = new JPanel(); 
    control.setLayout(outerPanel); 

    JPanel layer1 = new JPanel(); 

    JLabel eDescription = new JLabel("Describe Event:"); 
    layer1.add(eDescription); 

    description = new JTextArea(""); 
    description.setEditable(true); 
    description.setColumns(17); 
    layer1.add(description); 

    control.add(layer1); 

    JPanel layer2 = new JPanel(); 

    JLabel eDifficulty = new JLabel("Event Difficulty (integers only):"); 
    layer2.add(eDifficulty); 

    difficulty = new JTextField(""); 
    difficulty.setEditable(true); 
    difficulty.setColumns(2); 
    layer2.add(difficulty); 

    JButton submit = new JButton("Submit"); 
    submit.addActionListener(this); 
    submit.setPreferredSize(new Dimension(74, 22)); 
    layer2.add(submit); 

    control.add(layer2); 


    JPanel layer3 = new JPanel(); 

    JLabel dice = new JLabel("dice: "); 
    layer3.add(dice); 

    JLabel d4 = new JLabel("d4"); 
    check4 = new JCheckBox(); 
    layer3.add(d4); 
    layer3.add(check4); 

    JLabel d6 = new JLabel("d6"); 
    check6 = new JCheckBox(); 
    layer3.add(d6); 
    layer3.add(check6); 

    JLabel d8 = new JLabel("d8"); 
    check8 = new JCheckBox(); 
    layer3.add(d8); 
    layer3.add(check8); 

    JLabel d12 = new JLabel("d12"); 
    check12 = new JCheckBox(); 
    layer3.add(d12); 
    layer3.add(check12); 

    JLabel d20 = new JLabel("d20"); 
    check20 = new JCheckBox(); 
    layer3.add(d20); 
    layer3.add(check20); 

    control.add(layer3); 

    JPanel layer4 = new JPanel(); 

    JLabel skills = new JLabel("Skills Required: "); 
    layer4.add(skills); 

    JLabel strLabel = new JLabel("Str"); 
    str = new JCheckBox(); 
    layer4.add(strLabel); 
    layer4.add(str); 

    JLabel aglLabel = new JLabel("Agl"); 
    agl = new JCheckBox(); 
    layer4.add(aglLabel); 
    layer4.add(agl); 

    JLabel manaLabel = new JLabel("Mana"); 
    mana = new JCheckBox(); 
    layer4.add(manaLabel); 
    layer4.add(mana); 

    control.add(layer4); 

    container.add(control); 
    //   setPreferredSize(new Dimension(200, 20)); 

    UserStatPanel stats = new UserStatPanel(game); 
    stats.updateStatPanel(game); 
    container.add(stats); 


    add(container); 
    setVisible(true); 
} 


public class Event implements Serializable 
{ 
    public String eventDescription ; 
    public String diff ; 

    public boolean strChecked ; 
    public boolean aglChecked ; 
    public boolean manaChecked ; 

    public boolean d4checked ; 
    public boolean d6checked ; 
    public boolean d8checked ; 
    public boolean d12checked ; 
    public boolean d20checked; 

    public Event() 
    { 
     eventDescription = description.getText(); 
     diff = difficulty.getText(); 
     strChecked = str.isSelected(); 
     aglChecked = agl.isSelected(); 
     manaChecked = mana.isSelected(); 
     d4checked = check4.isSelected(); 
     d6checked = check6.isSelected(); 
     d8checked = check8.isSelected(); 
     d12checked = check12.isSelected(); 
     d20checked = check20.isSelected(); 
    } 


} 
Event nEvent; 

public void actionPerformed(ActionEvent evt) 
{ 
    String cmd = evt.getActionCommand(); 
    if(cmd.equals("Submit")) 
    { 
     nEvent = new Event(); 
     connection.send(nEvent); 
    } 


} 



} 

这是我的错误信息（这是异常短）：

Client send thread terminated by IOException: java.io.NotSerializableException: testGame.WindowGameActual$WindowClient 
Client send thread terminated. 
Client receive thread terminated. 
Hub receive thread terminated by IOException: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: testGame.WindowGameActual$WindowClient 

如果你需要我的任何其他类的让我知道。

谢谢！

Answer 1

您的类Event是WindowGameActual的内部类，因此无论您何时试图序列化Event的实例，WindowGameActual的封闭实例及其所有字段都将被序列化。

解决方案：除非真正合适，否则不要使用内部类，将Event类提升为它自己的文件。

Answer 2

异常消息清楚地表明WindowClient不是可序列化的。修复它的最合理的方法是使客户端（WindowClient扩展）可序列化

Answer 3

看看XStream http://x-stream.github.io/它具有与序列化/反序列化相同的功能，除了你正在处理XML。不需要一个类来实现Serializable。这将解决您的所有问题，而无需任何解决方法。