File --> Setting --> Editor --> General --> Code Completion --> Match case 取消勾選
File --> Setting --> Editor --> General --> Code Completion --> Match case 取消勾選
File → Project Structure → Project → Project SDK → New → JDK...... → Apply → OK
File --> Setting --> Editor --> General --> Other --> Show quick documentation on mouse move 勾選
File --> Setting --> Editor --> General --> Font --> Apply --> OK
File → Setting → Editor → Code Style → Java → Tabs and Indents ...... → Apply → OK