java自定义实现Iterable接口

1.Iterable包含一个生成Iterator的iterator()方法，并且可使用Foreach遍历。
2.必须要实现iterator()方法，并且要实现iterator的hasNext和next方法

package com.demo;

import java.util.Iterator;

public class IterablerImpl
 
   implements Iterable
  
    { private T[] t = null; public IterablerImpl(T[] t) { this.t = t; } @Override public Iterator
   
     iterator() { return new Iterator
    
     () { private Integer index = 0; @Override public boolean hasNext() { return index < t.length; } @Override public T next() { return t[index++]; } }; } public static void main(String[] args) { IterablerImpl
     
       iterablerImpl = new IterablerImpl
      
       (new String[]{"hello", "world"}); for (String string : iterablerImpl) { System.out.println(string); } } }