import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class ArrayListDemo {
public static void main(String args[]){
List<String> list = new ArrayList<String>();
list.add("luojiahui");
list.add("luojiafeng");
//????1
Iterator it1 = list.iterator();
while(it1.hasNext()){
System.out.println(it1.next());
}
//????2
for(Iterator it2 = list.iterator();it2.hasNext();){
System.out.println(it2.next());
}
//????3
for(String tmp:list){
System.out.println(tmp);
}
//????4
for(int i = 0;i < list.size(); i ++){
System.out.println(list.get(i));
}
}
}