Use of eclipse advanced development tools

Poor memory!

Q: How do I display the row number?

A: Step: select the show line numbers check box under window → preferences → generic → editors → text editors.

Q: How do I set the color of parentheses?

A: Step: Window → Java → editor → you can find and select matching brackets highlight on the right panel to modify the color value.

Q: How can I change the auto-completion function? (It may be affected by vs development tools. The shortcut key Alt +/is not applicable /)

A: steps:Window → Java → Editor→ Content assist: You can find auto activation triggers for Java on the panel. You can add abcdefghigklmnoparstuvwxyzabcdefghijklmnopqrstuvwxyz to save it.