重学java——list and link例子

1-创建list or link

2-创建学生对象

3-add方法

4-迭代器 or for or superfor 

package com.cn1;

import java.sql.SQLOutput;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.linkedList;

public class ListDemo {
    public static void main(String[] args) {
        //创建一个Arraylist数组
        ArrayList arr = new ArrayList();
        arr.add("helllo");
        arr.add("helllo1");
        arr.add("helllo2");
        arr.add("helllo3");

        //bianli
        Iterator it = arr.iterator();
        while (it.hasNext()){
            String s = it.next();
            System.out.println(s);
        }
        System.out.println("------------");
        for(String s : arr){
            System.out.println(s);
        }
        System.out.println("------link------");
        linkedList link = new linkedList();
        link.add("hello");
        link.add("java");
        link.add("wooo");
        Iterator itlink = link.iterator();
        System.out.println("-----------");
        while (itlink.hasNext()){
            String s1 = itlink.next();
            System.out.println(s1);
        }
        for(String s1:link){
            System.out.println(s1);
        }


        ArrayList list1 = new ArrayList();
        Student s = new Student("ZHANG MANYU",12);
        Student s1 = new Student("ZHANG MAN  YU",12);
        Student s2 = new Student("ZHANG MA   NYU",12);

        list1.add(s);
        list1.add(s1);
        list1.add(s2);


         for (Student s3:list1){
             System.out.println(s3.getAge()+s3.getName());
         }
        System.out.println("-----------");
         for(int i=0;i it2 = list1.iterator();
         while (it2.hasNext()){
            Student S = it2.next();
            System.out.println(S.getAge()+S.getName());
        }
        System.out.println("----------------------");
         linkedList  link1 = new linkedList();
         Student student1 = new Student("ddd",123);
         Student student2 = new Student("ddfd",123);
         Student student3 = new Student("ddeed",123);

         link1.add(student1);
         link1.add(student2);
         link1.add(student3);

         for (Student student5 :link1){
             System.out.println(student5.getAge()+student5.getName());
         }

    }
}