Question: Open the DOS command window, enter javac directly, and then press Enter. An error appears: 'javac' is not an internal or external command, nor a runnable program ...
Answer: The reason for the error is that the windows operating system cannot find the javac command file
Question: What is the relationship between configuring the environment variable path and java?
Answer: It doesn't matter. The path environment variable belongs to a knowledge point of windows operating system. The path environment variable is specifically for the Windows operating system.
To write javac and use it at will, you need to configure the directory where javac is located in the environment variable path: path = xxxx; C: \ Program Files \ Java \ jdk.1.7.0_80 \ bin
