Java获取类型的默认值

Question

So I'm writing a program in Java after only using C# for a few years and I can't seem to find the answer to this anywhere. When creating a generic<T> class in C#, if you want to set a variable to the default value of T , you use default(T) . Is there the same functionality in Java and if so how would I do it?

Answer 1

Java does not have an equivalent facility. If you want to pass a value to a generic method you must pass it explicitly, even if you're just invoking the type's default constructor.

Answer 2

the default of T in Java is null, as there is no support for primitive generics. This is actually inline with c#, where default of reference type is null and default of numeric types is 0.