package ceshi;
import java.util.Iterator;
import java.util.LinkedList;
public class LinkedListDemo {
public static void main(String[] args) {
// TODO 自动生成的方法存根
fun2();
}
public static void fun() {
LinkedList<String> link = new LinkedList<String>();
link.addLast("张无忌1");
link.addLast("张无忌2");
link.addLast("张无忌3");
link.addFirst("1");
link.addFirst("2");
link.addFirst("3");
Iterator it = link.iterator();
while (it.hasNext()) {
String type = (String) it.next();
System.out.println(type);
}
}
getFirst(); getLast(); 先判断集合是否为空后 在进行循环或者获得操作
public static void fun2(){
LinkedList<String> link = new LinkedList<String>();
link.add("杜甫");
link.add("杜甫1");
link.add("杜甫2");
link.add("杜甫3");
String first2 = link.getFirst();
System.out.println(first2);
if(!link.isEmpty()) {
String first = link.getFirst();
System.out.println(first);
}
}
//删除功能
public static void fun2() {
LinkedList<String> link = new LinkedList<String>();
link.add("每当我听到雨声");
link.add("就像听到了心中的迷茫");
link.removeFirst();
System.out.println(link);
}
}