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() {

//創(chuàng)建一個(gè)課程對(duì)象，并通過調(diào)用add方法，添加到備選課程List中

Course cr1=new Course("1","數(shù)據(jù)結(jié)構(gòu) ");

coursesToSelect.add(cr1);

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

//System.out.println("添加了一個(gè)課程："+temp.id+":"+temp.name);

Course cr2=new Course("2","C語(yǔ)音");

coursesToSelect.add(0, cr2);

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

//System.out.println("添加了一個(gè)課程："+temp2.id+":"+temp2.name);

/*courseToSelect.add(cr1);

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

System.out.println("添加了一個(gè)課程："+temp.id+":"+temp.name);*/

//以下方法會(huì)拋出數(shù)組下標(biāo)越界異常

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

//courseToselect.add(4, cr3);

Course[] course= {new Course("3","離散數(shù)學(xué)"),new Course("4","匯編語(yǔ)音")};

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

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

coursesToSelect.get(4);

Course[] course2= {new Course("5","高等數(shù)學(xué)"),new Course("6","大學(xué)英語(yǔ)")};

coursesToSelect.addAll(2,Arrays.asList(course2));

Course temp5=(Course)coursesToSelect.get(2);

Course temp6=(Course)coursesToSelect.get(3);

//System.out.println("添加了倆個(gè)課程："+temp5.id+":"+temp5.name+";"+temp6.id+":"+temp6.name);

}

/**

* 通過for each 方法訪問集合元素

* @param args

*/

public void testForEach(){

System.out.println("有如下課程可選（通過for each方法訪問）：");

for(Object obj:coursesToSelect) {

Course cr=(Course) obj;

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

}

}

public static void main(String[] args) {

// TODO Auto-generated method stub

SetTest st=new SetTest();

st.testAdd();

st.testForEach();

//創(chuàng)建一個(gè)新的學(xué)生對(duì)象

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

System.out.println("歡迎學(xué)生："+student.name+"選課!");

//創(chuàng)建一個(gè)Scanner對(duì)象，用來(lái)接收從鍵盤輸入的課程ID

@SuppressWarnings("resource")

Scanner console=new Scanner(System.in);

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

System.out.println("輸入課程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) {

? ? //打印輸出 學(xué)生所選的課程

? ? for(Course cr:student.courses) {

? ? System.out.println("您選擇了課程:"+cr.id+":"+cr.name);

? ? }

? ? }

}

? ??