[Eclipse plugin] eclipse checkstyle code style check

1. Installation
Mainpage:
Http://eclipse-cs.sourceforge.net/
Eclipse Update site:
Http://eclipse-cs.sourceforge.net/update/

Reference specifications:
Java Language Specification
Http://java.sun.com/docs/books/jls/

2. Settings
After the installation is complete, you can set it in preference-checkstyle.
Right-click a project and choose checkstyle> active)
Select a check configuration file
Select a check range (if the projectCodeMany must be set, otherwise memory consumption is very high and it is easy to crash :))

The code problem occurs in the problem perspective. You can find the error details in the preference settings.

3. Custom
In the corresponding directory of plugin, you can refer to sun_checks.xml to specify the check items you need