任何实现了Iterable接口的类，都可以用forEach语句，并且Java中大部分的Collection都可以用forEach,除了Map
1 import java.util.*;
2 public class AdapterMethodiom implements Iterable<String>
3 {
4 protected String[] words = ("hello world this is a good day").split(" ");
5 public Iterator<String> iterator() {
6 return new Iterator<String>(){
7 private int index =0;
8
9 @Override
10 public boolean hasNext() {
11 return index < words.length;
12 }
13
14 @Override
15 public String next() {
16
17 return words[index++];
18 }
19
20 };
21
22 }
23 public static void main(String[] args) {
24 for(String s:new AdapterMethodiom())
25 {
26 System.out.println(s+" ");
27 }
28
29 }
30 }
