package com_imooc_collection;
/*
* 备选课程类
* */
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class ListTest {
    /*
    * 用于存放备选课程的list
    * */
    public List coursesToSelect;

    public ListTest()
    {
        this.coursesToSelect=new ArrayList();
    }
    //用于往coursesToSelect中添加备选课程
    public void testAdd(){
        //创建爱你一个课程对象，并通过调用add方法，添加到备选课程
        Course cr1 = new Course("1","数据结构");
        coursesToSelect.add(cr1);
        Course temp = (Course)coursesToSelect.get(0);
        System.out.println("添加了课程"+temp.id+":"+temp.name);

        Course cr2= new Course("2","C语言");
        coursesToSelect.add(0,cr2);
        Course temp2=(Course)coursesToSelect.get(0);
        System.out.println("添加了课程"+temp2.id+":"+temp2.name);

        /*Course cr3= new Course("3","test");
        coursesToSelect.add(2,cr3);
        Course temp3= (Course)coursesToSelect.get(0);
        System.out.println("添加了课程"+temp3.id+":"+temp3.name);*/

        Course[] course ={new Course("3","离散数学"),new Course("4","汇编语言")};
        coursesToSelect.addAll(Arrays.asList(course));
        Course temp3 = (Course) coursesToSelect.get(2);
        Course temp4 = (Course) coursesToSelect.get(3);
        System.out.println("添加了两门课程:"+temp3.id+":"+temp3.name+";"+temp4.id+":"+temp4.name);

        Course[] course2 ={new Course("5","高等数学"),new Course("6","大学英语")};
        coursesToSelect.addAll(2,Arrays.asList(course2));
        Course temp5 = (Course) coursesToSelect.get(2);
        Course temp6 = (Course) coursesToSelect.get(3);
        System.out.println("添加了两门课程："+temp5.id+";"+temp5.name+";"+temp6.id+":"+temp6.name);
        /*
        * 取得list中的元素的方法
        * */
        public void HY(){                       //此处报错，提示缺少分号
            int size = coursesToSelect.size();
            System.out.println("有如下课程待选：");
            for (int i = 0; i < size; i++)
            {
                Course cr = (Course) coursesToSelect.get(i);
                System.out.println("课程：" + cr.id + ":" + cr.name);
            }
        }
    }
    public static void main(String[] arg)
    {
        ListTest lt=new ListTest();
        lt.testAdd();
//        lt.testGet();
    }
}