问题描述
在Eclipse中，使用CCW插件，我想将clojure文件加载到REPL中。问题是，我有一个import语句为我自己的java类，但显然不是在我的类路径。
In Eclipse, using the CCW plug-in, I want to load a clojure file into a REPL. The problem is that I have an import statement for one of my own java classes, but apparently it is not in my classpath.
(ns my-clj-ns
(:import [alg.gen Enumerator]))
我必须在Clojure REPL中使用/测试每个类吗？
Do I have to make jars out of every class that I want use/test in a Clojure REPL?
目前，尝试将我的clj加载到REPL中会导致错误：
在Clojure REPL中加载文件未正常完成。有关详细信息，请参阅日志。
java.lang.NullPointerException
Currently, trying to load my clj into a REPL results in an error:"Load file in Clojure REPL" did not complete normally. Please see the log for more information.java.lang.NullPointerException
任何帮助将非常感激。
推荐答案
您的代码对我来说很好。
Your code looks fine to me.
我怀疑问题是您的Eclipse Java Build Path Eclipse包含在您的应用程序的类路径中。
I suspect the issue is with your Eclipse Java Build Path, which determines what Eclipse includes in the classpath for your application.
特别是，如果您的Java类位于单独的项目中，您需要将该项目添加到构建路径右键单击项目/ Properties / Java Build Path / Projects）或将其打包为jar。
In particular, if your Java class is in a separate project, you will need to either add that project to the build path (right click on project / Properties / Java Build Path / Projects) or package it as a jar.
当你开始有更复杂的构建需求时，开始查看来为您处理这类事情。 Maven是一个痛苦学习/设置在第一，但它支付的长期。
When you start to have more sophisticated build requirements, you may also want to start looking at Maven to handle this kind of thing for you. Maven is a pain to learn / set up in the first place but it pays of in the long run.
也是一个很好的工具但我个人不使用它的原因如下：
Leiningen is also a great tool to use but I personally don't use it for the following reasons:
- 它在命令行上很好，但是没有集成这么好使用Eclipse工作流程
- Maven在Java世界中使用更广泛，并得到更好的支持
这篇关于在Clojure REPL中使用自定义Java类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！