JInternalFrame不显示

Question

从我的MainFrame我创建一个内部框架并将其添加到我的桌面窗格，但内部框架不会显示。我试图找出现在3个小时，我需要一些帮助。在我实现观察者模式之前，它工作得很好。所以我认为它有一些与此有关的东西，并且改变了一些东西，并且仔细检查了关键代码。目前还没有解决方案。我刚刚意识到我的英语有时候很糟糕。对不起！

2个代码块已经缩短。对不起，他们还很长。但我不确定我犯了什么错误。如果你需要更多的代码或其他东西，请告诉我。非常感谢你提前。

这是我的主框架的代码：

public class LangtonsAmeise extends JFrame implements ActionListener { 
private JDesktopPane desk; 
private JPanel panelButtons; 
JMenuBar jmb; 
JMenu file,modus; 
JMenuItem load,save, exit, mSetzen,mMalen,mLaufen; 
JSlider slider; 
static int xInt, yInt,xFrame=450,yFrame=450; 
static boolean bSetzen = false, bMalen = false, running = false; 


Random randomGenerator = new Random(); 

JLabel xLabel, yLabel, speed, statusText,status; 
JButton start, stop, addAnt; 
JTextField xField, yField; 

public LangtonsAmeise() { 
    // Desktop 
    desk = new JDesktopPane(); 
    getContentPane().add(desk, BorderLayout.CENTER); 
/*  Those 4 lines work just fine. Internal Frame gets displayed. 
    JInternalFrame j = new JInternalFrame(); 
    desk.add(j); 
    j.setSize(new Dimension(300,300)); 
    j.setVisible(true); 
    */ 


    speed = new JLabel("Geschwindigkeit"); 

    xLabel = new JLabel("x:"); 
    yLabel = new JLabel("y:"); 
    xLabel.setHorizontalAlignment(JLabel.RIGHT); 
    yLabel.setHorizontalAlignment(JLabel.RIGHT); 
    xLabel.setOpaque(true); 
    yLabel.setOpaque(true); 
    xField = new JTextField(); 
    yField = new JTextField(); 

    xField.setDocument(new IntegerDocument(2)); 
    yField.setDocument(new IntegerDocument(2)); 

    start = new JButton("Fenster erstellen"); 
    stop = new JButton("Stopp"); 

    start.setMargin(new Insets(0, 0, 0, 0)); 
    stop.setMargin(new Insets(0, 0, 0, 0)); 
    // Buttons 
    panelButtons = new JPanel(); 
    panelButtons.setLayout(new GridLayout());  

    panelButtons.add(start); 
    panelButtons.add(xLabel); 
    panelButtons.add(xField); 
    panelButtons.add(yLabel); 
    panelButtons.add(yField); 
    panelButtons.add(speed); 
    panelButtons.add(slider); 
    panelButtons.add(new Panel()); 
    panelButtons.add(stop); 

    start.addActionListener(this); 
    stop.addActionListener(this); 
    add(panelButtons, BorderLayout.NORTH); 

    statusText = new JLabel("Aktueller Modus:"); 
    status = new JLabel("Stopp"); 
    // JMenuBar 
    jmb = new JMenuBar(); 
    setJMenuBar(jmb); 
    file = new JMenu("Datei"); 
    modus = new JMenu("Modus"); 
    mLaufen = new JMenuItem("Laufen"); 
    mMalen = new JMenuItem("Malen"); 
    mSetzen = new JMenuItem("Setzen"); 
    load = new JMenuItem("Simulation laden"); 
    save = new JMenuItem("Simulation speichern"); 

    mSetzen.addActionListener(this); 
    mMalen.addActionListener(this); 
    mLaufen.addActionListener(this); 
    exit = new JMenuItem("Exit"); 

    file.add(save); 
    file.add(load); 
    file.addSeparator(); 
    file.add(exit); 

    save.addActionListener(this); 
    load.addActionListener(this); 

    modus.add(mLaufen); 
    modus.add(mSetzen); 
    modus.add(mMalen); 

    jmb.add(file); 
    jmb.add(modus); 
    for (int i = 0; i < 20; i++) { 
     jmb.add(new JLabel(" "));    
    } 

    jmb.add(statusText); 
    jmb.add(status); 
    setSize(new Dimension(1000, 900)); 

    Dimension dim = Toolkit.getDefaultToolkit().getScreenSize(); 
    this.setLocation(dim.width/2 - this.getSize().width/2, dim.height 
      /2 - this.getSize().height/2); 
    xField.setText("5"); 
    yField.setText("5"); 
    setVisible(true); 
} 

public void actionPerformed(ActionEvent e) { 
    if (e.getActionCommand().equals("Fenster erstellen")) { 

     if (xField.getText().equals("") || yField.getText().equals("")) { 
      new popUpWindow(
        "Sie müssen eine Zahl zwischen 2 und 99 angeben!!"); 
     } else { 
      xInt = Integer.parseInt(xField.getText()); 
      yInt = Integer.parseInt(yField.getText()); 
      state s = new state(); 
      kindFenster k = new kindFenster(s, xInt, yInt); 
      s.addObserver(k); 
      addChild(k, this.getSize().width, this.getSize().height); 
     } 

    } 

    if (e.getActionCommand().equals("Stopp")) { 
     running=!running; 
     status.setText("Stopp"); 
    } 
} 

public void addChild(JInternalFrame kind, int xPixel, int yPixel) { 
    // kind.setSize(370, 370); 
    kind.setLocation(randomGenerator.nextInt(xPixel - kind.getSize().height), 
      randomGenerator.nextInt(yPixel - kind.getSize().height - 100)); 
    kind.setDefaultCloseOperation(JInternalFrame.DISPOSE_ON_CLOSE); 
    desk.add(kind); 

    kind.setVisible(true); 
    kind.repaint(); 
    kind.validate(); 
} 

public static void main(String[] args) { 
    LangtonsAmeise hauptFenster = new LangtonsAmeise(); 

} 

} 

这是我的内在结构：

public class kindFenster extends JInternalFrame implements ActionListener, 
    Serializable,Observer { 
/** 
* 
*/ 
private static final long serialVersionUID = 8939449766068226519L; 
static int nr = 0; 
static int x,y,xScale,yScale,xFrame,yFrame; 
static int sleeptime; 
state s; 
ArrayList<JButton> jbArray = new ArrayList<>(); 
ArrayList<ImageIcon> ameisen = new ArrayList<ImageIcon>(); 
public static ArrayList<AmeiseThread> threadList = new ArrayList<>(); 

Color alteFarbe, neueFarbe; 
JButton save, addAnt; 
JPanel panelButtonsKind; 
JSlider sliderKind; 
public JPanel panelSpielfeld; 

static SetzenActionListener sal = new SetzenActionListener(); 
static MouseMotionActionListener mmal = new MouseMotionActionListener(); 

public kindFenster(state s,int x, int y) { 
    super("Kind " + (++nr), true, true, true, true); 
    setLayout(new BorderLayout()); 
    this.s=s; 

    setSize(new Dimension(xFrame, yFrame)); 

    panelSpielfeld = new JPanel(); 
    panelSpielfeld.setLayout(new GridLayout(y, x)); 

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

    save = new JButton("Simulation speichern"); 
    addAnt = new JButton("Ameise hinzufügen"); 
    save.setMargin(new Insets(0, 0, 0, 0)); 
    addAnt.setMargin(new Insets(0, 0, 0, 0)); 

    addAnt.addActionListener(this); 
    save.addActionListener(this); 

    sliderKind = new JSlider(JSlider.HORIZONTAL, 1, 10, 5); 
    sliderKind.setSnapToTicks(true); 
    sliderKind.setPaintTicks(true); 
    sliderKind.setPaintTrack(true); 
    sliderKind.setMajorTickSpacing(1); 
    sliderKind.setPaintLabels(true); 

    sliderKind.addChangeListener(new ChangeListener() { 
     @Override 
     public void stateChanged(ChangeEvent e) { 
      if (threadList.size() >= 0) { 
       for (AmeiseThread t : threadList) { 
        JSlider source = (JSlider) e.getSource(); 
        if (!source.getValueIsAdjusting()) { 
         int speed = source.getValue(); 
         sleeptime = 1000/speed; 
        } 
       } 
      } 
     } 
    }); 

    panelButtonsKind.add(save); 
    panelButtonsKind.add(sliderKind); 
    panelButtonsKind.add(addAnt); 
    add(panelButtonsKind, BorderLayout.NORTH); 
    add(panelSpielfeld, BorderLayout.CENTER); 
    this.addComponentListener(new MyComponentAdapter()); 

    setVisible(true); 
    repaint(); 
    validate(); 
} 



public void actionPerformed(ActionEvent e) { 

    if (e.getActionCommand().equals("Ameise hinzufügen")) { 
     threadList.add(new AmeiseThread(this)); 
     threadList.get(threadList.size() - 1).start(); 
    } 
    if (e.getActionCommand().equals("Simulation speichern")) { 

     OutputStream fos = null; 
     try { 
      fos = new FileOutputStream("test"); 
      ObjectOutputStream o = new ObjectOutputStream(fos); 
      o.writeObject(this ); 
     } catch (IOException e1) { 
      System.err.println(e1); 
     } finally { 
      try { 
       fos.close(); 
      } catch (Exception e1) { 
       e1.printStackTrace(); 
      } 
     } 
    } 
} 

Answer 1

我想，那是因为你没有为你的JInternalFrame集大小。在你的代码中它是作为一个评论：

//kind.setSize(370, 370); 

当我删除“//”它适用于我。