Eclipse default tag todo, XXX, fixme, and custom tag

Some special annotation technologies in eclipse include:

1. // todo -- indicates the to-do list that has not been completed.
2. // XXX -- indicates the commentedCodeAlthough the functions are implemented, the implementation scheme remains to be discussed and hopes to be improved in the future.
3. // fixme -- indicates that the annotated code needs to be corrected.

4. Custom tags
Window --> preferences --> JAVA --> compiler --> task tags

All the preceding annotations are collected by the eclipse task view. It is a good habit to check the task view before the project is released.