为什么要配置classpath环境变量？ 一是为了方便引用，比如，JDK安装在C:\Program Files\Java\jdk1.5.0_17目录里，则设置JAVA_HOME为该目录 ...

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 ...

JAVA_HOME is an operating system (OS) environment variable which can optionally be set after either the Java Development Kit (JDK) or the Java Runtime Environment (JRE) is installed. The JAVA_HOME ...