LinkedList

public class LinkedListTest {

public static void main(String[] args) {
LinkedList<String> linkedList = new LinkedList<String>();
//共有的方法
linkedList.add("1");
linkedList.add("2");
linkedList.add("4");
linkedList.add("5");
linkedList.add(2, "3");
int lenght = linkedList.size();
System.out.println(lenght);//5
System.out.println(linkedList.get(2));//3
System.out.println(linkedList.contains("6"));//false
linkedList.remove("5");//1,2,3,4
System.out.println(linkedList.size());//4
linkedList.remove(0);//2,3,4
System.out.println(linkedList.contains("1"));//false
System.out.println(linkedList.indexOf("2"));//0
System.out.println(linkedList.lastIndexOf("4"));//2
linkedList.set(0, "0");//0,3,4
System.out.println(linkedList.contains("2"));//false
System.out.println(linkedList.indexOf("0"));//0
//自己的方法
linkedList.addFirst("-1");//-1,0,3,4
linkedList.addLast("5");//-1,0,3,4,5
System.out.println(linkedList.getFirst());//-1
System.out.println(linkedList.getLast());//5
linkedList.removeFirst();//0,3,4,5
System.out.println(linkedList.contains("-1"));//false
linkedList.removeLast();//0,3,4
System.out.println(linkedList.contains("5"));//false

//存对象数据
LinkedList<News> linkedList2 = new LinkedList<News>();
News news0 = new News("1", "12");
News news1 = new News("2", "23");
News news2 = new News("3", "34");
News news3 = new News("4", "45");
linkedList2.add(news0);
linkedList2.add(news1);
linkedList2.add(news2);
linkedList2.add(news3);

//通过for循环加get方法实现
int count = 0;
for (int i = 0; i < linkedList2.size(); i++) {
News news = linkedList2.get(i);
if(news.title.equals("4")){
System.out.println(news.content);
break;
}
count++;
if(count == linkedList2.size()){
System.out.println("没找到!");
return;
}
}
//通过Iterator实现
int count2 = 0;
Iterator<News> iterator = linkedList2.iterator();
while (iterator.hasNext()) {
News news = iterator.next();
if(news.title.equals("6")){
System.out.println(news.content);
count2 = 0;
}
count2++;
if(count2 == linkedList2.size()){
System.out.println("未找到！");
return;
}
}
}
}