没有主方法如何生成jar文件? [英] How to generate jar file with no main method?

问题描述

我正在使用Eclipse编写程序.我有9个课程，并且我使用的是applet，我的代码中没有main方法.

I am using Eclipse to write my program. I have 9 classes and I'm using applet and there is no main method within my codes.

有人告诉我，我需要提交一个可运行的Jar存档，包括源代码".以某种方式，当我尝试使用Eclipse导出"Runnable Jar File"导出程序时，找不到程序的启动配置.在Eclipse中，它运行良好，但我无法导出可运行的Jar文件.

I have been told that I need to submit a "runnable Jar Archive including source code". Somehow when I try to export my program using the Eclipse export "Runnable Jar File", I cannot find the launch configuration of my program. It works perfectly fine within Eclipse but I just can't export a runnable Jar File.

有人可以告诉我是什么问题吗?

Can someone tell me what is the problem please?

肯尼

推荐答案

据我所知，可执行JAR需要一个主要方法.在清单Main-Class标记中，只能声明该主类所在的类(无方法).也许以下代码为您提供了可能的解决方案:

As far as I know an executable JAR needs a main method. In the manifest Main-Class tag only a class can be declared (no method) where the the main-class is located. Maybe the following code is a possible solution for you:

package CaesarCodePackage;


public class StartClass {


 public static void main(String [] args)
  {
     // create an object of type appletclass 
     AppletClass theApplet = new AppletClass();
     theApplet.init();   // invoke the applet's init() method
     theApplet.start();  // starts the applet

     // If the applet views something (this is optional)
     // Create a window (JFrame) and make applet the content pane.
      javax.swing.JFrame window = new javax.swing.JFrame("Caesar's Cipher");
      window.setContentPane(theApplet);
      window.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
      window.pack();              // Arrange the components.
      window.setVisible(true);    // Make the window visible.
    }
}

如果不需要框架来显示小程序，只需启动它即可.

If you do not need a Frame for showing the applet only start it.

(感谢Haider M. al-Khateeb提供的代码)

(Thanks to Haider M. al-Khateeb for the code)

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