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>();
????}

????/**
?????*?添加備選課程
?????*/
????public??void?testAdd(){
????????//創(chuàng)建課程對象，并通過調(diào)用add方法添加到備選課程List
????????Course?course01?=?new?Course("002","c語言");
????????coursesToSelect.add(course01);
????????//對象存入集合時都變成Object類型，取出時也是object需要轉(zhuǎn)換類型
????????Course?temp?=?(Course)?coursesToSelect.get(0);
????????System.out.println("添加了課程："?+?temp.id?+?":"?+temp.name);
????????Course?course02?=?new?Course("001","高等數(shù)學");
????????coursesToSelect.add(0,course02);
????????Course?temp01?=?(Course)?coursesToSelect.get(0);
????????Course?temp03?=?(Course)?coursesToSelect.get(0);
????????Course[]?courses?=?{new?Course("003","近代詩"),new?Course("004","計算機導論")};
????????coursesToSelect.addAll(Arrays.asList(courses));
????????Course?temp02?=?(Course)?coursesToSelect.get(2);

????}
????/**
?????*?通過for?each方法訪問集合元素
?????*
?????*?@param
?????*/

????public?void?testForEachForSet(Student?student){

????????//?打印輸出，學生所選的課程！
????????System.out.println("共選擇了："?+?student.courses.size()?+?"門課程！");
????????for?(Course?cr?:?student.courses)?{
????????????System.out.println("選擇了課程："?+?cr.id?+?":"?+?cr.name);
????????}
????}
????public?static??void?main(String[]?args)?{
????????SetTest?st?=?new?SetTest();
????????st.testAdd();
????????st.testForEach();
????????Student?student?=?new?Student("1","水水");
????????System.out.println("歡迎學生："+student.name?+"選課");
????????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);


????????????????}

????????????}
????????????st.testForEachForSet(student);
????????}

????}
????public?void?testForEach()?{
????????System.out.println("有如下課程待選(通過for?each訪問)：");
????????for?(Object?obj?:?coursesToSelect)?{
????????????Course?cr?=?(Course)?obj;
????????????System.out.println("課程："?+?cr.id?+?":"?+?cr.name);
????????}
????}



}

提示選擇了0門課程