Question

Is it possible to include a jpanel into an container from another java file? Let suppose I have 2 java files fileA.java and fileB.java. And I want to add the entire display content of fileB.java inside a container in fileA.java. Is this possible? Just a confusion running in for a very long time. Thanks in advance.

Answer 1

You could make the other file/cass extends JPanel and then since it is a JPanel, you can add it to any other file. For example:

FileA.java

public class FileA {
    public FileA() { 
        JFrame jf = new JFrame();
        jf.setLayout(new BorderLayout());

        FileB b = new FileB();

        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setBounds(100,100,800,600);
        jf.setVisible(true);

        add(b, BorderLayout.CENTER);
    }
    public static void main(String[] args) {
        new FileA();
    }
}

FileB.java

public class FileB extends JPanel {
    public FileB() { 
        setLayout(new BorderLayout());
        add(new JLabel("Example"), BorderLayout.CENTER);
    }
}

Or you can simply have a JPanel be a field in another file and access it with a getter method.

Example:

FileC.java

public class FileC {

    private JPanel panel;

    public FileC() {
        panel = new JPanel();
        panel.add(new JLabel("Example 2"));
    }

    public JPanel getPanel() {
        return panel;
    }

}