Learn from teacher Wang Generics (iv): Define generic interfaces and implementations

Defining generic interfaces and their implementations
Keynote Teacher: Wang Shaohua QQ Group: 483773664 Learning Goals

1. Generic interface

2, the implementation of the three types of generic interface

First, define the interface

123	publicinterface Generator<T> {    publicT next();}

Second, the realization of this interface

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public class fruitgenerator implements generator<string> {        Private string[] Fruits = New string[]{ "Apple" , "Banana" , "Pear" };        @Override      Public String next () {          Random rand = new random ();          return Fruits[rand.nextint ( 3 )];      } }

Third, call

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publicclass Main {     public static void main(String[] args) {        FruitGenerator generator = newFruitGenerator();        System.out.println(generator.next());        System.out.println(generator.next());        System.out.println(generator.next());        System.out.println(generator.next());    }}

Iv. three ways to implement the interface

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publicclass FruitGenerator<T> implements Generator<T>{     @Override    public T next() {        // TODO Auto-generated method stub        return null;    }}

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public Class fruitgenerator implements generator<string>{        @Override      Public String Next () {          //TODO auto-generated method Stub          return null ;      }   }

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publicclass FruitGenerator implements Generator{     @Override    public Object next() {        // TODO Auto-generated method stub        returnnull;    }}

Five, learning video URL:

Http://edu.51cto.com/course/course_id-6083.html

From for notes (Wiz)

Learn from teacher Wang Generics (iv): Define generic interfaces and implementations