的JSpinner佔據整個寬度的JOptionPane

Question

我試圖把JSpinner的一個的JOptionPane如下，

 SpinnerModel saModel = new SpinnerNumberModel(11, 1, 36, 1); 
     JSpinner saSpinner = new JSpinner(saModel); 
     Dimension d = saSpinner.getSize(); 
     d.width = 20; 
     saSpinner.setSize(d); 

     Object[] message = { "Choose the key number for sa.", saSpinner }; 

     JOptionPane optionPane = new JOptionPane(message, 
       JOptionPane.PLAIN_MESSAGE, JOptionPane.OK_CANCEL_OPTION); 
     JDialog dialog = optionPane.createDialog(frame, "Change Sa Key"); 
     dialog.setVisible(true); 

這工作，但唯一的問題是，JSpinner的填充對話框的寬度不管我設定的尺寸。我也嘗試過使用setPreferredSize（）。我該如何解決？

Answer 1

爲什麼不而不是僅僅把它放在一個JPanel？

SpinnerModel saModel = new SpinnerNumberModel(11, 1, 36, 1); 
    JSpinner saSpinner = new JSpinner(saModel); 
    Dimension d = saSpinner.getSize(); 
    d.width = 20; 
    saSpinner.setSize(d); 

    // Object[] message = { "Choose the key number for sa.", saSpinner }; 

    JPanel panel = new JPanel(); 
    panel.add(new JLabel("Choose the key number for sa:")); 
    panel.add(saSpinner); 

    JOptionPane optionPane = new JOptionPane(panel, 
      JOptionPane.PLAIN_MESSAGE, JOptionPane.OK_CANCEL_OPTION); 
    JDialog dialog = optionPane.createDialog(frame, "Change Sa Key"); 
    dialog.setVisible(true); 

雖然我自己，我不知道我會爲此創建一個JDialog，而是隻會顯示JOptionPane.showConfirmDialog(...)方法：

SpinnerModel saModel = new SpinnerNumberModel(11, 1, 36, 1); 
    JSpinner saSpinner = new JSpinner(saModel); 
    Dimension d = saSpinner.getSize(); 
    d.width = 20; 
    saSpinner.setSize(d); 

    JPanel panel = new JPanel(); 
    panel.add(new JLabel("Choose the key number for sa:")); 
    panel.add(saSpinner); 

    int selection = JOptionPane.showConfirmDialog(frame, panel, "Change Sa Key", 
      JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE); 
    if (selection == JOptionPane.OK_OPTION) { 
    System.out.println("Sa Key is: " + saModel.getValue().toString()); 
    }