跟王老师学泛型（四）：定义泛型接口及实现

定义泛型接口及其实现

主讲教师：王少华 QQ群：483773664

学习目标

1、泛型接口

2、实现泛型接口的三种情况

一、定义接口

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public interface Generator<T> {      public T next(); }

二、实现这个接口

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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 )];      } }

三、调用

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

四、实现接口的三种情况

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

五、学习视频网址：

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

来自为知笔记(Wiz)