如何添加JPanel動態並使其可點擊？

Question

我想創建一個基本的GUI程序，其目的是：

1. 動態插入的JPanel（將創建JPanel的數量是在我的列表的大小基地）是滾動的。
2. 無論何時單擊，從JPanel獲取信息。

到目前爲止，這是我做過什麼：

... 

public class BeesFrame extends javax.swing.JFrame { 
    List<String> bees = new ArrayList<>(Arrays.asList("Bee 1", "Bee 2", "Bee 3", 
                "Bee 4", "Bee 5", "Bee 6", 
                "Bee 7", "Bee 8", "Bee 9", 
                "Bee 10", "Bee 11", "Bee 12", 
                "Bee 13")); 
    GridBagLayout layout = new GridBagLayout(); 

    JScrollPane scrollpane; 
    JPanel beesPanel; 
    JPanel beesCell; 
    JLabel label; 

    public BeesFrame() { 
     initComponents(); 
     label = new JLabel(); 
     for(int i = 0; i < bees.size(); i++){ 
      beesCell = new JPanel(); 
      beesCell.setName(bees.get(i)); 
      beesCell.setPreferredSize(new Dimension(100, 100)); 
      beesCell.setMinimumSize(new Dimension(100, 100)); 
      beesCell.setBackground(Color.yellow); 

      label.setHorizontalTextPosition(SwingConstants.CENTER); 
      label.setText(beesCell.getName()); 

      beesCell.add(label); 
      beesCell.validate(); 
      beesCell.repaint(); 
      System.out.println(bees.get(i)); 
     } 

     beesMainPanel.setLayout(new GridLayout((bees.size()/4)+1, 4, 1, 1)); 
     beesMainPanel.add(beesCell); 
     beesCell.setVisible(true); 
     beesCell.addMouseListener(new MouseAdapter() { 
      public void mousePressed(MouseEvent e){ 
       JPanel panel = (JPanel) getComponentAt(e.getPoint()); 
       panel.setName(label.getText()); 
       outPut(panel); 
      } 
     }); 

     beesCell.validate(); 
     beesCell.repaint(); 

    } 

    void outPut(JPanel panel){ 
     System.out.println("Panel...."+panel.getName()); 
    } 

... // some other code generated by Netbeans 


} 

但不是正確顯示它的。只有我列表中的最後一個被插入，如果我點擊它，它說javax.swing.JRootPane不能轉換爲javax.swing.JPanel。這是發生錯誤：

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JRootPane cannot be cast to javax.swing.JPanel 
    at catchingbees.frame.BeesFrame$1.mousePressed(BeesFrame.java:79) 
    at java.awt.Component.processMouseEvent(Component.java:6530) 
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) 
    ... 

這裏是我的輸出的屏幕截圖：

但是這就是我打算做：

很感謝任何形式的幫助。

Answer 1

將MouseListener添加到每個面板，然後使用MouseEvent的getSource()方法訪問被單擊的面板。

MouseListener ml = new MouseAdapter() 
{ 
    @Override 
    public void mousePressed(MouseEvent e) 
    { 
     JPanel panel = (JPanel)e.getSource(); 

     // do your processing on the panel 
    } 
} 

然後在創建你根本面板循環：

panel.addMouseListener(ml);