Javac is not an internal or external command

In addition to http://jingyan.baidu.com/article/1e5468f924210a484961b7f0.html, there is a situation, that is, the path configuration is wrong. Path should be the location of the bin in the JDK (don't forget to add a semicolon);

JAVA_HOME:JDK installation path (no semicolon);

The path of the bin under the PATH:JDK

CLASSPATH:

.; %java_home%lib\dt.jar;%java_home%lib\tools;%java_home%jre\lib\rt.jar;

2. DOS commands commonly used in Java:

CD Change work Path

CD file name//Enter the next level

Cd\ back to the root directory

CD: Return to the previous level

DIR Displays the file for the current folder

Javac is not an internal or external command