"Java Learning" Javac and Java commands

For Java classes that are not in the package

For example Mywindow.java under the C:\Users\guoyan\Desktop directory

① first cut to the current directory

C:

CD C:\Users\guoyan\Desktop

② performing Javac Mywindow.java compilation

③ execute Java Mywindow run again

For Java classes in packages

Example: Hello.java in the C:\Users\guoyan\Desktop\Test directory, in the test package

① first cut to the current directory

C:

CD C:\Users\guoyan\Desktop\Test

② performing Javac Mywindow.java compilation

Compile and cut to upper-level directory (C:\Users\guoyan\Desktop\)

Cd..

③ execute Java Test.mywindow run again

You can also compile the Hello.java in the C:\Users\guoyan\Desktop\Test directory into a different folder

For example, compile to C:\Users\guoyan\Desktop\myclass (compile generated. class file in this directory)

① first cut to the current directory

C:

CD C:\Users\guoyan\Desktop\Test

② performing javac-d C:\Users\guoyan\Desktop\myclass Hello.java compilation

Compile and cut to C:\Users\guoyan\Desktop\myclass

CD C:\Users\guoyan\Desktop\myclass

③ Run

Java Test.hello

Jar Packaging Related commands

Typically, you need to package a compiled. class file to generate an executable file

① Write a configuration file

Arbitrarily name A. txt file, such as Config.txt

File contents:

Main-class:test.hello

(Note that there will be a space after the colon, and finally a newline to indicate the end of the file content)

② Cut to Directory (C:\Users\guoyan\Desktop\myclass)

Execute JAR-CVFM my.jar config.txt Test Package

Perform Java-jar My.jar operation

or double-click to run (double-click the case without the console, can only represent the graphical interface)

"Java Learning" Javac and Java commands