Fix harmless bugs and Rewrite comments

[wickdynex]

Description

Fix some harmless bugs and rewrite some comments on the method.

For example:

• Use equals method to substitute == to compare Integer object.
• Rewrite method's comment to make it easier to use.
• Remove unnecessary logic to reduce code size and enhance execution time.

Related Issue

None

Type of Change

Please select the type of change you are making:

• Bug fix (non-breaking change that fixes an issue)
• Update logic
• Rewrite document

Additional Information

I've run command mvn test to test this modification🥳, but can't pass all because the postgresql module was wrong🥺. As a result, you can merge it easily into main branch. If confused, plz contact to me. Looking forward to your reply🥰.

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[dsyer]

LGTM. Could you squash it down to a single commit though please?

[wickdynex]

LGTM. Could you squash it down to a single commit though please?

Alright, I've squash all the commit into one, if done the code review, plz merge it🤗. Thanks❤️.

[dsyer]

You need to squash and rebase and force push to get it down to 1 commit, please. Github currently shows 5 commits.

[wickdynex]

You need to squash and rebase and force push to get it down to 1 commit, please. Github currently shows 5 commits.

Oh, I've never used this squash feature before, and takes a little time to learn how to use🥺. And finally squash the 6 commits successfully, thanks for your reminder🥳. Btw, I fixed the reversal of equal logic. In my memory, I've fixed this bug, but perhaps due to the wrong operate to use rebase command, maybe I lost the correct modification😵‍💫.

Now, it words as expected like this:

Is there anything I can do for this PR? Looking forward to your reply, and also appreciate for your guide🥰.