Java Coding Problems , published by Packt

不錯的書，可以學Java 8到Java 12的語法，範例程式碼也不錯

https://github.com/PacktPublishing/Java-Coding-Problems

也有第二版是Java 12到Java 21的語法，還在努力看第一版，尚未入手第二版xd

https://github.com/PacktPublishing/Java-Coding-Problems-Second-Edition/