From there using IDE ~
①File → New → Java Project → fill in the project name, select jdk version, other defaults, click finish.
② in the Src (source files) Right → new → package (package) → Fill in Name (in reverse order with the company's Web site is customary: com.jiang.java), click finish.
③ right on the package name → new → class → fill in the class name, other defaults, click finish.
④ write code
[Main] hit the shortcut keys main press alt + /
Run: blank right mouse button → Run As → Java Application
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Font:
Windows→ Preferences→ General→ Appearance→ Colors and Fonts →Java Editor Text Font