Java 搜索链表2

import java.util.LinkedList;

public class Demo {
   public static void main(String args[]) {
      LinkedList<Integer> linkedlist1 = new LinkedList<>();
      linkedlist1.add(001);
      linkedlist1.add(002);
      linkedlist1.add(003);
      linkedlist1.add(004);
      linkedlist1.add(005);
      linkedlist1.add(003);
      System.out.println("First index of 004 is : " + linkedlist1.indexOf(004));
      System.out.println("Last index of 004 is : " + linkedlist1.lastIndexOf(004));
   }
}