C#和Java的泛型差異

http://www.jprl.com/Blog/archive/development/2007/Aug-31.html
雖然很舊的文章，但是很詳細的比較了C#和Java泛型的差異

最近在看Essential C# 6這本書，第11章(C# 7是在第12章)有提到Java和C#泛型機制的不同。搜尋了一些資料，小弟我大致整理如下，歡迎先進補充指正，謝謝

JDK 5加入泛型，為了避免修改JVM規格影響向下相容，是在編譯器實作泛型(不是在JVM實作)，另外Java的泛型不支援Primitive Type(等同C#的Value Type)
Java採用Code Sharing實作，對每一個泛型類或泛型方法只會生成一份object code(byte code)，Java compiler透過type erasure實作，也導致無法在runtime時期取得泛型類或泛型方法的實際型別
C#和C++ Template採用Code Specialization實作，對每一個泛型類或泛型方法都會產生一份object code
C# 2.0加入泛型，.NET是在CLI(common language implementation)加入泛型支援，性能較好，且可以在runtime時期取得泛型類或泛型方法的實際型別資訊

參考資料:
Java魔法堂：解讀基於Type Erasure的泛型
https://www.cnblogs.com/fsjohnhuang/p/4288614.html

聊聊Java泛型類型擦除及Flink類型暗示（type hint）機制
https://www.jianshu.com/p/cfb8c1386f69

Type Erasure
https://docs.oracle.com/javase/tutorial/java/generics/erasure.html

https://stackoverflow.com/questions/355060/c-sharp-vs-java-generics

https://stackoverflow.com/questions/31693/what-are-the-differences-between-generics-in-c-sharp-and-java-and-templates-i

C# vs Java : Generics
http://toddgerspacher.blogspot.com/2017/07/c-vs-java-generics.html

Generics in Java
https://en.wikipedia.org/wiki/Generics_in_Java#Problems_with_type_erasure

Generics in the Run Time (C# Programming Guide)
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/generics/generics-in-the-run-time

.NET Column: Introducing Generics in the CLR
https://docs.microsoft.com/en-us/archive/msdn-magazine/2003/september/net-column-introducing-generics-in-the-clr
Finally, the research group at Microsoft has modified a version of the shared source common language implementation (CLI), code-named "Rotor," to include generics support.

https://dotnetfiddle.net/MEK7FM