![](https://img.laitimes.com/img/__Qf2AjLwojIjJCLyojI0JCLicmbw5SNyQDOiFWZ4cTO5MjYmNDN5UDNjhDNlZzYxYmNzEDZh9CX0JXZ252bj91Ztl2Lc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.png)
package tuesday;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class ListDemo {
public static void main(String[] args){
//建立集合對象
List<String> list=new ArrayList<String>();
//添加元素
list.add("Hello");
list.add("world");
list.add("java");
list.add("world"); //list可重複元素
//System.out.println(list);
//疊代器周遊元素(Iterator)
Iterator<String> it=list.iterator();
while(it.hasNext()){
String s=it.next();
System.out.println(s);
}
}
}