Whenever we reach the Java Collections section in training, the same question always comes up. There are too many types, and I don't know which one to use. ArrayList, LinkedList, HashSet, TreeSet, ...
自分で作ったクラスを HashSet や HashMap のキーに入れるときは、equals と hashCode を実装する必要があります。実装していないと、中身が同じでも「別のもの」として2つ入ります。Java 16以降なら record を使うと自動で用意されます。
本文梳理Maven多模块聚合、分层架构与MyBatis：聚合与父子工程区别、依赖管理、SSM三层组合、MyBatis设计及环境搭建，重点讲三层核心对象、动态代理、SqlSession方法与事务，附流程与易错点速查表。
Since vscode-java 1.2.0, it publishes platform specific versions to Microsoft VS Code marketplace. The platform versions have JRE 21 embedded in Java extension for platforms such as win32-x64, ...
Configurable framework and JRE settings are overridden through component-specific JBP_CONFIG_* environment variables (for example, JBP_CONFIG_OPEN_JDK_JRE and JBP_CONFIG_DEBUG). Consult each component ...
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