Java的设计哲学是显式声明
doing it yourself becomes a tall order
jdk vs jre
jdk: java development kit； jre: java runtime environment； jdk包含jre，jre包含jvm；
Uses nvim-lspconfig to setup jdtls
Java Development Tools Language Server (JDTLS) is a language server for Java that provides IDE-like features to editors that support the Language Server Protocol (LSP).
mason.nvim vs lazy.nvim
mason针对开发工具，与nvim-lspconfig配合使用，提供了更多的功能，比如自动补全、代码跳转等；