JAVA泛型接口

事例代码：

 package com.xt.thins_15_3;

 import java.util.Iterator;

 /**
  * 泛型接口
  *
  * @author xue
  *
  * @param <T>
  */
 interface Generic<T> {
     public T next();
 }

 /**
  * 斐波纳契（一种整数数列）,普通类实现
  *
  * @author xue
  *
  */
 class Fibonacci implements Generic<Integer> {

     protected static int count = 0;

     @Override
     public Integer next() {
         // TODO Auto-generated method stub
         return fib(count++);
     }

     public int fib(int n) {
         if (n < 2)
             return 1;
         return fib(n - 2) + fib(n - 1);
     }
 }

 /**
  * 迭代适配器迭代斐波纳契（一种整数数列）
  *
  * @author xue
  *
  */
 class IterableFibonacci extends Fibonacci implements Iterable<Integer> {

     private int size;

     public IterableFibonacci(int size) {
         this.size = size;
         count = 0;
     }

     @Override
     public Iterator<Integer> iterator() {
         // TODO Auto-generated method stub
         return new Iterator<Integer>() {

             @Override
             public void remove() {
                 // TODO Auto-generated method stub

             }

             @Override
             public Integer next() {
                 // TODO Auto-generated method stub
                 size--;
                 return IterableFibonacci.this.next();
             }

             @Override
             public boolean hasNext() {
                 // TODO Auto-generated method stub
                 return size > 0;
             }
         };
     }

 }

 public class FibonacciTest {
     public static void main(String[] args) {
         Fibonacci fib = new Fibonacci();
         for (int i = 0; i < 20; i++) {
             System.out.print(fib.next() + ",");
         }
         System.out.println("\n------------------------------");
         IterableFibonacci ifib = new IterableFibonacci(20);
         for (Integer integer : ifib) {
             System.out.print(integer + ",");
         }
     }
 }