集合

　　

package workhome;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ListDemo {
    public static void main(String[] args) {
        //定义集合list
        
        
        
        List<String> list=new ArrayList<String>();
        
        Iterator<String> it=list.iterator();
        //通过迭代器访问    
        while(it.hasNext()) {
            String s=it.next();
            System.out.println(s);
        }
    }
}