Generics is one of the best things that happened to Java. Anyone who has worked with Java during its pre-JDK5 era can attest to that. For new developments, it has drastically reduced the amount of written codes and provided compile-time type checking using Generic Types. However, there are some thing you cannot do with Java Generics types, i.e., limitations.
Generics Limitation 1 – We Cannot Call their Constructors
Generic Types cannot be instantiated using its constructor. For example:
The compile-time error is as follows:
Generics Limitation 2 – We cannot Create Arrays
We cannot create an array of a Generic Type.
The compile-time error is as follows:
Generics Limitation 3 – We Cannot use Call instanceof with Generics Types
Calling instanceof on Generic Types results in compile-time errors.
The compile-time error is as follows: 
Limitation 4 – We Cannot Use primitives as Generic Type Parameters
Generics only deal with classes and objects.
The compile-time error is as follows: 
Limitation 5 – We Cannot Create static variables with Generics
Generic Types cannot be used to create static variables.
The compile-time error is as follows: 
