我怎么能运行applet作为一个应用程序？ [英] how can i run an applet as an application?

问题描述

我有一个Applet类的，我希望把它作为应用程序运行，所以我写了下列code：

I have an Applet class, and I want to make it run as an application, so I wrote to following code:

public static void main(String args[]) {
JFrame app = new JFrame("Applet Container");
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
app.setSize(200, 100);
Hangman applet = new Hangman();
applet.init();
app.setLayout(new BorderLayout());
app.setSize(500,500);
app.getContentPane().add(applet, BorderLayout.CENTER);
app.setVisible(true);
}

请注意：刽子手是applet类。如果我运行它，它做工精细，但我所特林做的，是让作为应用程序运行。

Note: Hangman is the applet class. And if i run it, it work fine, but what I am tring to do, is to make it run as an application.

当我运行上面的主，我得到了以下错误：

When I run the above main, I got the following error:

Exception in thread "main" java.lang.NullPointerException
at java.applet.Applet.getCodeBase(Applet.java:152)
at Me.Hangman.init(Hangman.java:138)
at Me.Client.main(Client.java:54)
Java Result: 1

此错误是来自于刽子手类这一行：

This error is came from this line in the Hangman class:

danceMusic = getAudioClip(getCodeBase(), "../../audio/dance.au");

得到codeBase的（）方法返回null，我需要我怎样才能使这种方法正常工作，或者与可能访问我的文件以获得资源的另一种方法取代它的帮助？

GetCodeBase() method returns null, I need help on how can I make this method work properly, or maybe replace it with another method that may access my files to get resources?

感谢您提前

推荐答案

小程序有一个特殊的运行时环境。如果你希望你的code也作为应用程序运行，那么你可以不依赖于由环境所提供的任何功能。

Applets have a special runtime environment. If you want your code to run also as an application then you can not rely on ANY functionality provided by that environment.

显然，你在这里使用的小程序特异功能。你必须寻找如何得到这个应用程序中完成的，那么检测到正在运行的环境和使用适当的方法。

Obviously you are using an Applet-specific function here. You have to search for how to get this done in an application, then detect the environment you are running in and use the appropriate methods.

编辑：

而不是得到codeBase的（）我会尝试：

getClass().getProtectionDomain().getCodeSource().getLocation();

但 getAudioClip 在一个applet也定义的，所以这是一个不走了。取而代之的 java.applet.AudioClip中，你必须使用的javax.sound.sampled API。

But getAudioClip is also defined in an applet, so that is a no-go too. Instead of java.applet.AudioClip you have to use the javax.sound.sampled API.

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