Java Iterable、Iterator、iterator区别

import java.util.*;

public class IterableTest implements Iterable<String>{

	protected String[] words = new String[]{"123","456","789","0"};

	public Iterator<String> iterator(){
		return new Iterator<String>(){
			private int index = 0;
			public boolean hasNext(){
				return index < words.length;
			}

			public String next(){
				return words[index++];
			}

			public void remove(){
				throw new UnsupportedOperationException();
			}
		};
	}

	public static void main(String args[]){
		for(String s : new IterableTest())
			System.out.println(s);
	}
}

Iterable是一个包含一个产生Iterator的iterator()函数。