What's Wrong WIth My Code involving JFrames

问题

It's Giving me an error saying that "The method setContentPane(Container) in the type JFrame is not applicable for the arguments (GamePanel)"

Here is my Code:

package main;

import javax.swing.JFrame;

public class Game {

public static void main(String[] args){

    JFrame window = new JFrame("Dragon Tales");
    window.setContentPane(new GamePanel());
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setResizable(false);
}

}

I am following a tutorial exactly and his screen shows no errors at all.

回答1:

Your GamePanel class does not extend any Swing GUI component such as Container or one of its children. Probably it should extend JPanel.

i.e.,

import javax.swing.JPanel;

public class GamePanel extends JPanel {
   // .... etc
}

Please don't add the urgent or "help as soon as possible" bit. Yes your question is very important, but it is no more important than anyone else's.

Edit: Mad's link is worth putting in the answer: The Oracle Swing Tutorial.

来源：https://stackoverflow.com/questions/21355547/whats-wrong-with-my-code-involving-jframes