Double-click to open eclipse, the following interface will pop up, let me declare that I am using the 2022-03 version
2. Select wackspace (namespace), that is, Where is your code placed, generally choose namespace
3. Next, do some common configuration of eclipse, all my versions are JavaEE version
4. Eclipse supports multiple perspectives
5. Set the left menu bar
6. Set package Explorer to the left menu
7. Set the navigator to the left menu
8. Move the Outline on the right to the left, this is the final setting result
9. Search for console, put the console under the perspective
10. Preferences settings: Windows--Preferences
11. Set the character encoding to: UTF-8, set the font size to 14
12. Set the new menu: Window--Perspective--Cutomize Perspective
13. Select Menu Visibility--File--New, check the required items according to the needs
14. Save our previous settings: Window--Perspective--SevePerspective
15. The setting is complete, create a new project
16. Create a new project, set the name, the JRE version used
17. Under src, create a new package
18. Create a new java class under com.javase.java and name it HelloJava
19. Writing code
20. Output the result, HelloJava
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