JFrames和一个frame.add（）;方法

Question

我目前正在编写一个类似于跳棋游戏的程序。我正在尝试使用frame.add（）;添加实例化面板的方法，它给我一个错误，说容器类型中的方法add（String，Component）不适用于参数（surroundpanel，String）。

我是Java的新手，非常感谢您提供的任何帮助。

由于

public class surround {

private static JFrame frame;

public surround(int size, int start) {

    frame = new JFrame("Surround");
    surroundpanel panel = new surroundpanel(size, start);

    //Error is occurring here when trying to add panel 
    frame.add(panel, BorderLayout.NORTH);
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setResizable(false);


}
 /****** 
//Declaring my panel
private JPanel panel;

//Instantiating my panel
panel = new JPanel();

public class surroundpanel {

private JButton[][] board;
private JButton newGame;
private JButton Start;
private JButton Quit;

private surroundgame game;
//private final static in BDSIZE = 10;
private JMenuItem newGameItem;
private JMenuItem quitItem;
private GridLayout gameBoard;

private JPanel panel;
private JPanel butPanel;
private JPanel boardPanel;

 //Creating the JMenuItems/Menus/and Menu
 private JMenuBar menus;
 private JMenu fileMenu;

 private Cell [][] gBoard;




 /***********************************************************************
 * 
 * The Constructor that generates the GUI
 *
 */
public surroundpanel(int size, int start) {
    game = new surroundgame(size, start);

    boardPanel = new JPanel();
    panel = new JPanel();
    butPanel = new JPanel();

    newGame = new JButton();
    Start = new JButton();
    Quit = new JButton();

    //Assigning the newly created Swing Items values
     fileMenu = new JMenu("File");
     quitItem = new JMenuItem("Quit");
     newGameItem = new JMenuItem("New Game");
     menus = new JMenuBar();

    gameBoard = new GridLayout(game.getSizeRow(), game.getSizeCol());
    boardPanel.setLayout(gameBoard);
    ButtonListener listener = new ButtonListener();
    Quit.addActionListener(listener);
    Start.addActionListener(listener);
    newGame.addActionListener(listener);