JFrame沒有調整大小以適合JPanel

Question

我已經爲項目嘲笑了一個快速的GUI，我可以看到標籤和文本字段，但出於某種原因，窗口不會重新調整大小。

這裏是基本的破敗：

創建JFrame和添加的JPanel：

JFrame frame1 = new JFrame("Hotel Reservation App"); 
    frame1.getContentPane().add(rViewPan, BorderLayout.CENTER); 
    frame1.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 

    frame1.pack(); 
    frame1.setVisible(true); 

這是rViewPan JPanel的代碼：

private void initComponents() { 

    setLayout(new BorderLayout()); 

    arrivalDateTF = new JTextField(); 


    departureDateTF = new JTextField(); 
    roomCategoryTF = new JTextField(); 
    roomQtyTF = new JTextField(); 

    JTextField[] textFields = { arrivalDateTF, departureDateTF, roomCategoryTF, roomQtyTF }; 
    JLabel[] textLabels = { new JLabel("1 : "), new JLabel("2 : "), 
      new JLabel("3 : "), new JLabel("4 : ") 
    }; 

    JPanel displayPan = new JPanel(); 
    GridBagLayout gridBagLay = new GridBagLayout(); 
    GridBagConstraints gridBagC = new GridBagConstraints(); 

    displayPan.setLayout(gridBagLay); 
    SwingUtilities.addTextElementsAsRows(textLabels, textFields, gridBagLay, displayPan); 

    gridBagC.gridwidth = GridBagConstraints.REMAINDER; 
    gridBagC.anchor = GridBagConstraints.EAST; 
    gridBagC.weightx = 1.0; 

    displayPan.add(new JLabel(" "), gridBagC); 

    submitB = new JButton("Soumettre"); 
    displayPan.add(submitB, gridBagC); 

    SwingUtilities.addStdBorder(displayPan, "Reservation"); 
    add(displayPan, BorderLayout.CENTER); 

} 

我基本上得到一個窗口大小適當，但字段水平隱藏。

Answer 1

..窗口沒有按其包含的大小重新調整大小。

該變體是。

如果你不能弄清楚如何使你的GUI的行爲，我建議你&張貼SSCCE。

import java.awt.*; 
import javax.swing.*; 

// TODO don't extend JPanel, just create an instance 
class TestGui extends JPanel { 

    JTextField arrivalDateTF; 
    JTextField departureDateTF; 
    JTextField roomCategoryTF; 
    JTextField roomQtyTF; 
    JButton submitB; 

    TestGui() { 
     initComponents(); 
    } 

    private void initComponents() { 
     setLayout(new BorderLayout()); 

     arrivalDateTF = new JTextField(6); 
     departureDateTF = new JTextField(6); 
     roomCategoryTF = new JTextField(8); 
     roomQtyTF = new JTextField(2); 

     JTextField[] textFields = { arrivalDateTF, departureDateTF, roomCategoryTF, roomQtyTF }; 
     JLabel[] textLabels = { new JLabel("1 : "), new JLabel("2 : "), 
      new JLabel("3 : "), new JLabel("4 : ") 
     }; 

     JPanel displayPan = new JPanel(); 
     GridBagLayout gridBagLay = new GridBagLayout(); 
     GridBagConstraints gridBagC = new GridBagConstraints(); 

     displayPan.setLayout(gridBagLay); 
//  SwingUtilities.addTextElementsAsRows(textLabels, textFields, gridBagLay, displayPan); 
     for (int ii=0; ii<textFields.length; ii++) { 
      displayPan.add(textLabels[ii]); 
      displayPan.add(textFields[ii]); 
     } 

     gridBagC.gridwidth = GridBagConstraints.REMAINDER; 
     gridBagC.anchor = GridBagConstraints.EAST; 
     gridBagC.weightx = 1.0; 

     displayPan.add(new JLabel(" "), gridBagC); 

     submitB = new JButton("Soumettre"); 
     displayPan.add(submitB, gridBagC); 

//  SwingUtilities.addStdBorder(displayPan, "Reservation"); 
     add(displayPan, BorderLayout.CENTER); 
    } 

    public static void main(String[] args){ 
     SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       JFrame frame1 = new JFrame("Hotel Reservation App"); 
       frame1.getContentPane().add(new TestGui(), BorderLayout.CENTER); 
       frame1.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 

       frame1.pack(); 
       frame1.setVisible(true); 
      } 
     }); 
    } 
}