cmd running "java -version" prompts that the main class cannot be found or cannot be loaded

Problem:

Input: java -version Error

Error: Main class-version cannot be found or cannot be loaded

(Related video tutorial sharing: java video tutorial)

Solution:

Under system variables, create a new CLASSPATH variable and add

.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;

Note: Add ## at the beginning.; at the end #;Next time you run it, restart cmd and then run java -version.

Related tutorial sharing:

java introductory tutorial

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