為什么是temp的id和name，不是cr1的id的id和name？
package com.imooc.cellection;
import java.util.Arrays;
import java.util.List;
import java.util.ArrayList;
public class ListTest {
? ?public List coursesToSelect;
? ?public ListTest(){
? this.coursesToSelect = new ArrayList();
? ?}
? ?public void testAdd(){
? 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("添加了課程："+temp.id+":"+temp.name);
? ?
2015-10-25
為了驗證數(shù)據(jù)確實傳進?了coursesToSelect
2015-08-25
你添加之后是第一個數(shù)據(jù)嗎？coursesToSelect.get(0);這是獲取的第一個數(shù)據(jù)