如何在Java中将1个程序分解为多个文件类？

Question

我有以下程序，用户的编号在0到100之间。计算机必须尝试使用​​二进制搜索算法进行猜测。

运行时会创建.class文件，但是如何将这些类放在单独的java文件中。

  public class GuessGame extends JFrame //implements ActionListener
{
    private JButton newGameButton, highButton, lowButton, correctButton, exitButton;
    private JTextField guessBox;
    private JLabel initialTextLabel, enterLabel;
    private JTextArea commentTextArea;
    private JScrollPane scroll;
    //guess is equal to half the highest number
    private int guess=50, high = 101, low = 0, tries;

    public GuessGame()
    {
        super("Guessing Game");
        //add buttons etc.
        //set the layout manager
        setLayout(new FlowLayout());

        //add components
        //set default jframe size
        setSize(400, 300);

        newGameButtonHandler nghandler = new newGameButtonHandler();
        newGameButton.addActionListener(nghandler);

        exitButtonHandler exithandler = new exitButtonHandler();
        exitButton.addActionListener(exithandler);

        highButtonHandler higherhander = new highButtonHandler();
        highButton.addActionListener(higherhander);

        lowButtonHandler lowerhander = new lowButtonHandler();
        lowButton.addActionListener(lowerhander);

        correctButtonHandler correcthander = new correctButtonHandler();
        correctButton.addActionListener(correcthander);

    }//end of GuessGame constructor

    //highButtonHandler class
    class highButtonHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
                high = guess;
                guess = low + (guess - low) / 2;
                tries++;
                commentTextArea.append("Is the number " + guess + " too small, too high or correct.\n");
        }
    }//end of high class