请他们的源码：
public interface Iterator
{
     public abstract boolean hasNext();
     public abstract Object next();
}

public interface Collection
{
     public abstract Iterator iterator();
}

public interface List extends Collection
{
     ...
}

public class ArrayList implements List
{
     public Iterator iterator() {
        return new Itr();
    }
   
    private class Itr implements Iterator {
        public boolean hasNext() {
            return xxx;;
        }
        public E next() {
            return xxx;
        }
    }
}

Collection类中这个方法public abstract Iterator iterator();和Iterator是什么样的关系？

1. Class Student
   
2. {
   
3.    private String name;
   
4.    private int age;
   
5. }
   
6. Student(String name,int age)
   
7. {
   
8. }
   
9. public String getName()
   
10. {
    
11.    return this.name
    
12. }
    
13. 
    

复制代码

就是返回迭代器对象