package com.imooc.collection;

import java.util.ArrayList;

import java.util.List;

/*

*

*  备选课程类

*/

public class ListTest {

public List coursesToSelect;

/*

*

* 用于存放备选课程的List

*/

public ListTest(){

this.coursesToSelect = new ArrayList();

}

/*

*

* 用于往 coursesToSelect 中添加备选课程

*/

public void testAdd(){

//创建一个课程对象，并通过调用add方法，添加到备选课程中

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);

//以下方法会抛出数组下标越界异常

//Course cr3 = new Course("3","test");

//coursesToSelect.add(4,cr3);

//以下为出现错误，自己不会调试过来，"没有Arrays类"

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);

//同上问题，百度说是引入包不正常，但是已经引入了ArrayList包。

Course[] course2 = {new Course("5","高等数学"),new Course("6","汇编语言")};

coursesToSelect.addAll(2,Arrays.asLst(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);

}

public void testGet(){

int size = coursesToSelect.size();

for(int i=0; i

Course cr = (Course) coursesToSelect.get(i);

System.out.println("课程"+cr.id+":"+cr.name);

}

}

public static void main( String[] args){

ListTest lt =new ListTest();

lt.testAdd();

lt.testGet();

}

}