如果不创建插件，就无法在 eclipse 中使用 JFace 和 SWT

发布于 2024-08-16 02:46:04 字数 2317 浏览 3 评论 0原文

免责声明：

这是 .NET GUI 试图绕过 JAVA 内容的典型案例。

问题描述：

我正在尝试使用 JFace 和 SWT 构建一个非常简单的 GUI - 代码很简单（有很多教程），但不那么简单的是我似乎无法获得 JFace 和SWT 在插件项目之外工作。

我希望能够在我的项目中毫无麻烦地使用 JFace 和 SWT，因为我将“C:/eclipse 3.5/plugins”放入我的 CLASSPATH 中（从我的计算机 --> 属性 --> 高级 --> ）环境变量）以及我可以在我的 PATH（本地用户路径和全局路径，当然）中找到的所有 swt-*.dll 作为本文在“安装 SWT 和 JFace”框中指出。

问题是我无法从 eclipse.org 导入任何内容，除非我直接引用 buildpath 中的 jar -->图书馆 -->添加外部 jar（为了构建它，我必须添加以下 jar：org.eclipse.swt.win32.win32.x86_3.5.1.v3555a.jar、org.eclipse.jar jface_3.5.1.M20090826-0800.jar）。一旦我这样做了，它就构建得很好，但是当我将其作为“Java应用程序”运行时，我收到以下错误（我应该运行为其他东西吗？）：

Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/core/runtime/IProgressMonitor
    at demo.ui.test.EntryPoint.main(EntryPoint.java:18)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.IProgressMonitor
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 1 more

我尝试调试它，基本上它被抛出一旦它尝试实例化 ApplicationWindow 类 (org.eclipse.jface.window.ApplicationWindow)。尝试重现该错误，我注释掉了所有代码，并将其替换为主代码中的以下代码，它在第一行抛出与上面相同的错误：

ApplicationWindow w = new ApplicationWindow(null); //<-- error on this line
w.setBlockOnOpen(true);
w.open();
Display.getCurrent().dispose();

问题：

问题 1：我怎样才能修复上面的错误（我想了解发生了什么）并让该死的东西运行？

问题 2：为什么这些 jar 对我的项目不可见以及如何制作它们？

由于我对 Java 和 eclipse 不熟悉，我可能错过了一些非常琐碎的事情。非常感谢任何帮助！

编辑：似乎其他人也遇到了同样的问题 --> http://www.eclipsezone.com/eclipse/forums/t60528.html - 不太清楚他们是如何解决的，感谢帮助

原文

DISCLAIMER:

this is the classic case of .NET GUI trying to work his way around JAVA stuff.

PROBLEM DESCRIPTION:

I am trying to build a very simple GUI with JFace and SWT - the code is straightforward (there's plenty tutorials), what it's not so straightforward is that I can't seem to get JFace and SWT to work outside a plugin project.

I would expect to be able to use JFace and SWT in my project no hassle, since I put "C:/eclipse 3.5/plugins" in my CLASSPATH (from my computer --> properties --> advanced --> environment variables) and all the swt-*.dll I could find in my PATH (both local user and global PATHs, to be sure) as this article indicates in the "Installing SWT and JFace" box.

Problem is I can't import anything from eclipse.org unless I reference directly the jars from buildpath --> libraries --> add external jars (in order for it to build I have to add the following jars: org.eclipse.swt.win32.win32.x86_3.5.1.v3555a.jar, org.eclipse.jface_3.5.1.M20090826-0800.jar). Once I do that it builds fine but then when I run it as "Java Application" I get the following error (should I RUN AS something else?):

Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/core/runtime/IProgressMonitor
    at demo.ui.test.EntryPoint.main(EntryPoint.java:18)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.IProgressMonitor
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 1 more

I tried to debug this and basically it is thrown as soon as it tries to instantiate the ApplicationWindow class (org.eclipse.jface.window.ApplicationWindow). Trying to reproduce the error, I commented out all my code and replaced it with the following in my main and it throws he same error as above on the first line:

ApplicationWindow w = new ApplicationWindow(null); //<-- error on this line
w.setBlockOnOpen(true);
w.open();
Display.getCurrent().dispose();

QUESTIONS:

Question 1: how can I fix the error above (I'd like to understand what's going on) and get the damn thing to run?

Question 2: why the jars are not visible to my project and how to make them?

I am probably missing something very trivial due to my lack of familiarity with Java and eclipse. Any help highly appreciated!

EDIT: seems like someone else had the same problem --> http://www.eclipsezone.com/eclipse/forums/t60528.html - not too clear how they solved it though, assistance appreciated

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深海里的那抹蓝 2024-08-23 02:46:04

IProgressMonitor 接口在您使用的这两个 jar 中不可用。您还需要将 org.eclipse.equinox.common 插件放在类路径中。 IProgressMonitor 无需运行整个 Eclipse 环境即可使用。

（这是您引用的文章中的解决方案。我最初认为 IProgressMonitor 位于 org.eclipse.core.runtime 插件中，但它已移至 org.eclipse.equinox.common，如 bug #122935)

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彼岸花似海 2024-08-23 02:46:04

与上面 Peter 的观点相呼应，我总是需要添加一堆 JAR 来让事情运行（特别是对于 JFace）。通常，我需要

./org.eclipse.core.commands_3.3.0.I20070605-0010.jar
./org.eclipse.core.runtime_3.3.100.v20070530.jar
./org.eclipse.equinox.common_3.3.0.v20070426.jar
./org.eclipse.jface_3.3.1.M20070910-0800b.jar
./org.eclipse.osgi_3.3.2.R33x_v20080105.jar
./org.eclipse.ui.forms_3.3.0.v20070511.jar

您可以使用 jarfinder 之类的工具来帮助发现哪些文件位于哪些 JAR 中。在 Windows 中，我似乎记得使用查找功能来查找文件系统上 eclipse 文件夹下的 zip/jar 文件中的 IProgressMonitor.class - 因为有时实际的 JAR 可能很难跟踪向下。

我通常通过查看失败原因、追踪/添加 JAR、冲洗并重复来进行工作。

做 RCP/插件似乎 Eclipse 会为你解决很多问题，做你自己的独立应用程序会带来额外的负担，但如果你坚持下去，拥有一个合适的独立的本机外观 GUI 真的很好。因此，我通常会设置普通（非插件）Eclipse 项目，它会迫使您面对这些问题（手动将 JAR 添加到类路径中）。当您想要分发项目时，它也会派上用场。

Echoing Peter's point above, I always have to add a bunch of JARs to get things running (especially for JFace). Typically, I'll need

./org.eclipse.core.commands_3.3.0.I20070605-0010.jar
./org.eclipse.core.runtime_3.3.100.v20070530.jar
./org.eclipse.equinox.common_3.3.0.v20070426.jar
./org.eclipse.jface_3.3.1.M20070910-0800b.jar
./org.eclipse.osgi_3.3.2.R33x_v20080105.jar
./org.eclipse.ui.forms_3.3.0.v20070511.jar

You can use something like jarfinder to help spot what files live in what JARs. In windows I seem to remember using the find feature to look for, say, IProgressMonitor.class in zip/jar files under the eclipse folder on the file system - as sometimes the actual JARs can be hard to track down.

I usually work by seeing what fails, tracking down / adding the JAR, rinse and repeat.

Doing RCP/plugins seems like Eclipse takes care of a lot of the issues for you, doing your own stand alone app comes with this extra baggage but its really nice to have a proper stand-alone native looking GUI if you stick with it. So I typically setup vanilla (non-plugin) eclipse projects and it forces you to confront these issues (add JARs to the classpath manually). It also comes in handy as and when you want to distribute your project.

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