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This article mainly explains "what is the inheritance and implementation of Java generics". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the inheritance and implementation of Java generics"?

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Once generic classes and generic interfaces are defined, they can be inherited and implemented.

Inheritance of two generic classes

1 code

Class A {E t;} public class Bextends A {public static void main (String [] args) {System.out.println ("B test");}}

2 run

B test

3 description

When subclass B is defined, if An is omitted, the T of B automatically becomes Object. It is recommended to add it when defining to retain the type parameters of the parent class. Class B can also add a new generic T1.

Implementation of three generic interfaces

1 code

Interface IT {public E dis ();} public class testIT implements IT {E e; public testIT (E) {this.e = e;} public E dis () {return e;} public static void main (String [] args) {testIT tt = new testIT ("test"); System.out.println (tt.dis ());}}

2 run

Test

3 description

The implementation class testIT cannot be omitted.

You must implement all the methods in the IT interface, just like the normal implementation class.

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