When you've set your CLASSPATH correctly you shouldn't need to use -classpath (-cp). <P>Personally I don't use it, but have made macros to my text editor for compiling and running java code.

值得注意的是，JDK已内置JRE，因此若已安装JDK，便无需单独安装JRE。 1、 JDK，即Java开发工具包，是进行Java程序开发的基础套件，堪称Java技术的核心 ...

学习Java前需理清JDK、JRE与JVM三者之间的关联与区别。1、 JDK包含JRE，JRE包含JVM，层层依赖。2、 Java开发工具包，简称JDK，是Java开发的核心组件，内置 ...

Right-click on the project root and select “Properties” Select “Libraries” on the left side and make sure “JDK 1.7” is selected at the Java Platform option.

The Java Development Kit (JDK) is a development environment for building Java applications and applets that can then run on any Java Virtual Machine (JVM). The JDK includes a variety of development ...