Setting the PATH Environment Variable
The PATH environment variable on your computer designates which directories the computer searches when looking for applications, such as the applications that enable you to compile and run your Java applications (called javac and java, respectively). Carefully follow the installation instructions for Java on your platform to ensure that you set the PATH environment variable correctly. The steps for setting environment variables differ by operating system and sometimes by operating system version (e.g., Windows 7 vs. Windows 8). Instructions for various platforms are listed at:
If you do not set the PATH variable correctly on Windows and some Linux installations, ...
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