如何在java中的另一个JPanel中获取JPanel的组件

Question

I have a JPanel(first JPanel) and it fill with another JPanel(second JPanel).

I add this second JPanel to first JPanel programmatically. Like below,

firstJPanel.removeAll();
JPanel secondJPanel = new JPanel(gridLayout);
secondJPanel.setBorder(new TitledBorder("Testing"));
secondJPanel.setName("secondJPanel");
firstJPanel.add(secondJPanel);
firstJPanel.revalidate();

The second JPanel has some components like JTextFields , JCheckBoxes, etc . I try to get these components . But I could get only the second JPanel.

Here is my code sample,

Component[] components = firstJPanel.getComponents();
for(int i=0;i<components.length;i++){
     System.out.println("Componenet name - " + components[i].getName());           
}

Have any iedas to get the components inside the second JPanel.

Best Regards.

Answer 1

You can use like

Component[] components = firstJPanel.getComponents();
for (int i = 0; i < components.length; i++) {
    System.out.println("Componenet name - " + components[i].getName());
    if (components[i] instanceof JPanel
            && components[i].equals(secondJPanel)) {

        Component s[] = ((JPanel) components[i]).getComponents();
        for (int j = 0; j < s.length; j++) {
            System.out.println("Sub Componenet name - " + s[j].getName());
        }
    }
}