为什么要配置classpath变量？ 配置classpath变量，才能使得java解释器知道到哪里去找标准类库，这些标准类库是别人已经写好了的，我们只管使用。比如我们常用到java.lang包中的类，在配置classpath变量后被设为默认导入，所以在写程序时就不用import这个包了。

Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. Dany Lepage discusses the architectural ...

In a previous Java 101 tutorial, you learned how to better organize your code by declaring reference types (also known as classes and interfaces) as members of other reference types and blocks. I also ...

Qt Jambi is a new and noteworthy alternative to Swing and Java 2D for developing rich, cross-platform desktop-application interfaces. In this article JavaWorld contributor Jeff Hanson introduces the ...

The Eclipse Foundation has just announced the release of a new version of the Eclipse Buildship project, which integrates the Gradle build tool with Eclipse. Version 2.2 supports Java 9 and introduces ...