How to compile and run java File under linux

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The command javac compiles and runs the corresponding java file.

For example: javac xxx.java will generate xxx.class in the current directory and then java xxx can run

But what if the running class references another external class?

For example, if there are objects referencing Test02.java in Test01.java, you need to compile the Test02.java command javac Test02.java first, then exit outside the package after compilation, and then compile the Test01.java class command javac-cp. Com/xxx/yyy/Test01.java, and then java com.xxx.yyy.Test01 can run.

As shown in the figure: there are Test01.java and Test02.java under the corresponding package path, and Test02 is referenced in the Test01.java code.

Compiling Test02.java first generates the Test02.class class file in the current directory.

Return to the outer layer of the packet to execute javac-cp. Com/xxx/yyy/Test01.java to compile the Test01.java file

Finally, execute java com.xxx.yyy.Test01 and run it.

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