JDBC DAO

This is a note.

DAO: Data Access Object, Including just CRUD(Create, Read, Update, Delete).

JDBC Transaction

Note about how to use transaction in database using JDBC.

JDBC Batch Operation using PreparedStatement

Note about how to do batch operation in database using JDBC.

JDBC Operate Blob Type

Note about how to operate Blob type in database using JDBC.

JDBC Database Operations

Note about how to operate database using JDBC.

JDBC Database Connection

I’m currently learning JDBC to operate database. This article is an note of what I learnt.

First time road test and failed

Today has been a rough day. The rain hasn’t helped my mood, and I was hoping for a better outcome. Despite feeling confident in my driving abilities and having driven to many places, including highways, I wasn’t able to pass my driving test.

Valine: Failed to load resource && anonymous avatar not shown

Recently, I found valine has an error showing Failed to load resource: net::ERR_NAME_NOT_RESOLVED. And the anonymous user avatar is also not shown.

LeetCode 2335. Minimum Amount of Time to Fill Cups

max(ceil(sum(A) / 2), max(A))

LeetCode 2231. Largest Number After Digit Swaps by Parity

This problem can be translated into...