如何将JPanel作为参数传递给方法？

Question

Let me ask. I´m working in a java project in Netbeans. I've created a JFrameForm (Design mode), inside the JFrameForm, there is five (5) JPanel.

I've found a method por enable/disable all components inside a Jpanel. Works.

private void changeState(){
    for(Component c : mypanel.getComponents()){
        c.setEnabled(false);
    }
}
//mypanel it's one of a five panels in JFrameForm.
//I would like pass all the JPanel as parameters

I'm try writing a method where I can pass like parameter, just, the JPanel that I need when I invoced the method. Can you help me?

I'm try this,but don't work:

private void changeState(JPanel p){
    for(Component c : p.getComponents()){
        c.setEnabled(false);
    }
}

I'm sorry if the answer it's very easy. I'm beginner in JAVA and in this community. I hope you can help me.

Answer 1

But it does work! When I run the following code (with your method included) it gives me 2 x true, and then 2 x false. So the method is fine.

public class Panelik extends JFrame {
    JPanel panel;
    JLabel label1, label2;

    public Panelik() {
        panel = new JPanel();
        label1 = new JLabel();
        label2 = new JLabel();
        panel.add(label1);
        panel.add(label2);

        System.out.println(label1.isEnabled());
        System.out.println(label2.isEnabled());

        changeState(panel);

        System.out.println(label1.isEnabled());
        System.out.println(label2.isEnabled());
    }

    public void changeState(JPanel p) {
        for(Component c : p.getComponents()) {
            c.setEnabled(false);
        }
    }

    public static void main(String[] args) {
        Panelik panelik = new Panelik();
    }
}