How to compile and run java program in terminal on mac system

This tutorial is based on the fact that everyone has installed the JDK environment.

First write a simple program that outputs "Hello world".

Note that the program name must be saved with the .java suffix.

Then switch to the directory where the source program is saved in the terminal. Here I saved it on the desktop, so I switched to the desktop folder

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Then enter "javac Hello.java" to compile the source program

After the compilation is completed, a .class file will be output

Finally enter "java Hello" in the terminal to run the program

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