我在同一個文件夾中編寫了幾個類，這是層次結構：bookpirate/-Window.java-Navigator.java-NavEventHandler.java所有文件都有“package bookpirate;” 在一開始的時候這是我導入它們的方法：導航器類：package bookpirate;import javax.swing.*;import java.awt.*;import bookpirate.NavEventHandler;public class Navigator{    private JPanel panel;    public JTextField page;    public JButton pageBack;    public JButton addBefore;    public JButton addAfter;    public JButton pageForward;    public JButton removePage;    public JButton undo;    public JTextField getPage() { return page; }    public JButton getPageBack() { return pageBack; }    public JButton getAddBefore() { return addBefore; }    public JButton getAddAfter() { return addAfter; }    public JButton getPageForward() { return pageForward; }    public JButton getRemovePage() { return removePage; }    public JButton getUndo() { return undo; }    public int nOfPages;    public int getNOfPages() { return nOfPages; }    public static void main(String[] args)    {        new Navigator();    }    public Navigator()    {        setListeners();        System.out.println("Created NavEventHandler");    }這是我編譯 NavEnventHandler 時得到的結果：C:\Users\...\bookpirate>javac NavEventHandler.javaNavEventHandler.java:5: error: cannot find symbolimport bookpirate.Navigator;                 ^  symbol:   class Navigator  location: package bookpirateNavEventHandler.java:9: error: cannot find symbol        Navigator navigator;        ^一直以來我都可以毫無錯誤地將它們編譯在一起C:\Users\Falangrater\Desktop\Files\Programming\bookpirate>javac NavEventHandler.java Navigator.java Window.javaC:\Users\Falangrater\Desktop\Files\Programming\bookpirate>但我無法一起或單獨運行它們C:\Users\Falangrater\Desktop\Files\Programming\bookpirate>java Window Navigator NavEventHandlerError: Could not find or load main class WindowC:\Users\Falangrater\Desktop\Files\Programming\bookpirate>我嘗試過制作一個manifest.txt文件Main-Class: Window我無法將 .mf 添加到文件中我試圖盡可能簡潔