Linked Questions

I am learning Java generics from a book. The book says that "Class Type Variables Are Not Valid in Static Contexts" and explains it with the following example. Consider a generic class with type ...

I'm new to generics, and am struggling with applying to my situation: I currently have several SyncData Classes, one for each object type that I wish to sync. I'm looking at changing this to a single ...

Someone wrote a generic class that I wish to test. It looks something like: public class < E > foo{ public static void main(String[] args){ do_stuff(); } } I have another ...

I'm trying to write a method(using generics) which takes two parameters and swap them but parameters can be of any type - int, char, float, String etc. Following is my code - public class SwapTest<...

My understanding is that a generic Java class needs to be parameterized over types before it can be put to use. I am surprised that the following sample code, in which the generic class has not been ...

Thank you all for reading, i'm trying to understand Generics, and i got this excersice where i create a singleton with a generic parameter. public class Singleton<T> { public static T ...

As the title states, why can't Java generics be used for static methods?

public static BTNode<E> treeCopy(BTNode<E> source) { if(source == null) return null; else { BTNode left = BTNode.treeCopy(source.left); BTNode ...

As of Java 8 you can have default or static methods implemented in Interfaces as the below public interface DbValuesEnumIface<ID, T extends Enum<T>> { T fromId(ID id); ID getId(); ...

I have a class containing a static create method. public class TestClass { public static <E> TestClass<E> create() { return new TestClass<E>(); } } when I use TestClass....

@Spence asked this Previous Question. So, how's that work in Java? Generic types are discarded at runtime in Java, so what happens to static variables of classes instantiated with different ...

Hey I would like to have generic model/entity class that would download by id of type long element from db. The method for that is like this: public class GenericModel { @Id @GeneratedValue(...

Here on this page, it has the below code example to introduce the generic methods? public static <K, V> boolean compare(Pair<K, V> p1, Pair<K, V> p2) { return p1.getKey().equals(...

I am trying to make a singleton like the following, but I keep getting a warning. If possible, I don't want suppress warning. Is there a way to do it? For now, I don't want to think about the ...

Coming from a C++ background, I was hoping to write few util static methods which could be used throughout my application without necessarily going via object creation. And I was hoping to use the ...