LinkedListTest

package ArrayListT;

import java.util.Iterator;
import java.util.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;
            }
        }
    }
}