Adding JPanel to JFrame

java swing jframe jpanel
Anonymous181 picture Anonymous181 · May 4, 2012 · Viewed 109.2k times · Source

I have a program in which a JPanel is added to a JFrame:

public class Test{

    Test2 test = new Test2();
    JFrame frame = new JFrame();

    Test(){

    ...
    frame.setLayout(new BorderLayout());
    frame.add(test, BorderLayout.CENTER);
    ...

    }

    //main

    ...

    }

    public class Test2{

    JPanel test2 = new JPanel();

    Test2(){

    ...

    }

}

I get an error asking me to change type of 'panel' to 'component'. I do I fix this error? It wants me to do: Component panel = new Component();

Answer

Andrew Thompson picture Andrew Thompson · May 4, 2012 
public class Test{

Test2 test = new Test2();
JFrame frame = new JFrame();

Test(){
...
frame.setLayout(new BorderLayout());
frame.add(test, BorderLayout.CENTER);
...
}

//main
...
}

//public class Test2{
public class Test2 extends JPanel {

//JPanel test2 = new JPanel();

Test2(){
...
}

Related questions

How to show/hide JPanels in a JFrame?

The application I am developing is a game. What I want to do is have JPanels that appear in the JFrame, like a text or message window, and then disappear when they are no longer used. I have designed these …

Read More
Java: Difference between the setPreferredSize() and setSize() methods in components

What is the main difference between setSize() and setPreferredSize(). Sometimes I used setSize(), sometimes setPreferredSize(), sometimes one does what I want, sometimes the other. What call should I use for JFrames and JPanels?

Read More
Automatically size JPanel inside JFrame

I have a JPanel subclass on which I add buttons, labels, tables, etc. To show on screen it I use JFrame: MainPanel mainPanel = new MainPanel(); //JPanel subclass JFrame mainFrame = new JFrame(); mainFrame.setTitle("main window title"); mainFrame.getContentPane().add(mainPanel); …

Read More