package com.imooc.collection;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Scanner;

public class SetTest {

public List<Course>coursesToSelect;

public SetTest() {

coursesToSelect=new ArrayList<Course>();

}

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List中

Course cr1=new Course("1","数据结构 ");

coursesToSelect.add(cr1);

Course temp=(Course) coursesToSelect.get(0);

//System.out.println("添加了一个课程："+temp.id+":"+temp.name);

Course cr2=new Course("2","C语音");

coursesToSelect.add(0, cr2);

Course temp2=(Course)coursesToSelect.get(0);

//System.out.println("添加了一个课程："+temp2.id+":"+temp2.name);

/*courseToSelect.add(cr1);

Course temp0=(Course) courseToSelect.get(2);

System.out.println("添加了一个课程："+temp.id+":"+temp.name);*/

//以下方法会抛出数组下标越界异常

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

//courseToselect.add(4, cr3);

Course[] course= {new Course("3","离散数学"),new Course("4","汇编语音")};

coursesToSelect.addAll(Arrays.asList(course));

Course temp3=(Course)coursesToSelect.get(3);

coursesToSelect.get(4);

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("添加了俩个课程："+temp5.id+":"+temp5.name+";"+temp6.id+":"+temp6.name);

}

/**

* 通过for each 方法访问集合元素

* @param args

*/

public void testForEach(){

System.out.println("有如下课程可选（通过for each方法访问）：");

for(Object obj:coursesToSelect) {

Course cr=(Course) obj;

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

}

}

public static void main(String[] args) {

// TODO Auto-generated method stub

SetTest st=new SetTest();

st.testAdd();

st.testForEach();

//创建一个新的学生对象

Student student=new Student("1","小明");

System.out.println("欢迎学生："+student.name+"选课!");

//创建一个Scanner对象，用来接收从键盘输入的课程ID

@SuppressWarnings("resource")

Scanner console=new Scanner(System.in);

for(int i=0;i<3;i++) {

System.out.println("输入课程ID");

String courseId=console.next();

for(Course cr:st.coursesToSelect) {

if(cr.id.equals(courseId)) {

student.courses.add(cr);

student.courses.add(cr);

}

}

}

st.testForEachForSet(student);

}

    public void testForEachForSet(Student student) {

    //打印输出 学生所选的课程

    for(Course cr:student.courses) {

    System.out.println("您选择了课程:"+cr.id+":"+cr.name);

    }

    }

}