package com.collection;
import java.util.ArrayList;
import java.util.List;

public class ListTest {
? ?public List BookToSelect;

? ?public ListTest(){
? ? ? ?this.BookToSelect=new ArrayList();
? ?}

? ?public void BookAdd(){
? ? ? ?Book bt=new Book("1.","《三國演義》");//此處編譯器報錯
? ? ? ?BookToSelect.add(bt);
? ? ? ?Book temp=(Book) BookToSelect.get(0);
? ? ? ?System.out.println("添加了第一本書："+bt.id+bt.name);
? ?}

? ?public static void main(Sring[] args){
? ? ? ?ListTest lt=new ListTest();
? ? ? ?lt.BookAdd();
? ?}
}

public class Book {
? ?public String id;
? ?public String name;

? ?public void Book(String id,String name) {
? ? ? ?this.id = id;
? ? ? ?this.name = name;
? ?}
}

//如果把Book類里面的屬性設置成private，那在BookAdd()中應該怎么去添加書呢？