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In the CMD to start the first day of the Java encounter problems
Time:05-12
Javac HelloEveryone. Java HelloEveryone. Java: 1: error: package Java. Lang, there is no Import the Java. Lang. *; ^ 1 error
In the CMD can display the javac and Java a bunch of things, the environment variable should be yes, extension also checked, this is a question of where the (don't laugh at me, just began to learn)