equals 已经重写了（自动重写的），第一次返回了true，但创建新对象后，所有课程都是返回的false,求解？

package 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;

private Scanner console;

public SetTest(){

coursesToSelect=new ArrayList<Course>();

console=new Scanner(System.in);

}

public void TestAdd()

{

Course cr1 =new Course("1","数据结构");

coursesToSelect.add(cr1);

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

//System.out.println("添加课程"+temp.id+":"+temp.name);

Course cr2 =new Course("2","c语言");

coursesToSelect.add(0, cr2);

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

//System.out.println("添加课程"+temp2.id+":"+temp2.name);

// coursesToSelect.add(cr1);

// Course temp0=(Course) coursesToSelect.get(2);

// System.out.println("添加课程"+temp0.id+":"+temp0.name);

//

// Course cr3 =new Course("3","语言");

// coursesToSelect.add(3, cr3);

// Course temp3=(Course) coursesToSelect.get(0);

// System.out.println("添加课程"+temp3.id+":"+temp3.name);

Course [] course={new Course("3","离散数学"),new Course("4","大学英语")};

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

Course temp3=(Course) coursesToSelect.get(2);

Course temp4=(Course) coursesToSelect.get(3);

//System.out.println("添加课程"+temp3.id+":"+temp3.name+"\n"+temp4.id+":"+temp.name);

Course [] course2={new Course("5","数学"),new Course("6","结构")};

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

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

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

//System.out.println("添加课程"+temp5.id+":"+temp5.name+"\n"+temp6.id+":"+temp6.name);

}

/**

* 

*通过foreach 

* @param args

*/

public void TestForeach(){

for(Object obj:coursesToSelect){

System.out.println("有如下待选课程foreach");

Course cr=(Course) obj;

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

}

}

/**

* 测试List的contains 方法

* @param args

*/

public void testListContains(){

//取得0个元素的课程

Course course=coursesToSelect.get(0);

System.out.println("取得课程"+course.name);

System.out.println("是否包含"+course.name+","+coursesToSelect.contains(course));

//创建新的对象

System.out.println("输入课程名称");

String name=console.next();

Course course2=new Course();

course2.name=name;

System.out.println("创建新的课程"+course2.name);

System.out.println("是否包含"+course2.name+","+coursesToSelect.contains(course2));

}

public static void main(String[] args) {

// TODO Auto-generated method stub

SetTest t1=new SetTest();

t1.TestAdd();

t1.testListContains();

//t1.TestForeach();

//学生选课

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

// System.out.println("欢迎"+student.name+"选课");

// Scanner console=new Scanner(System.in);

//

//

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

// System.out.println("输入要选课的id");

// String courseId=console.next();

// for (Course cr : t1.coursesToSelect) {

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

// student.courses.add(cr);

// /**

// * 重复添加无意义

// */

// //student.courses.add(cr);

// //student.courses.add(null);

//

//   

// }

//

// }

// }

// t1.testForEachSet(student);

}

public void testForEachSet(Student student)

{

System.out.println("选了多少课程"+student.courses.size());

for (Course cr : student.courses) {

System.out.println("选了什么课程"+cr.id+":"+cr.name);

}

}

}