怎么不对，，，显示很多错误
import java.util.ArrayList;
import java.util.List;
public class ListTest {
public List coursesToSelect;
public ListTest(){
this.coursesToSelect=new ArrayList();
public void testAdd(){
//创建一个课程对象，并通过调用add方法，添加到备选课程List中
Course cr1=new Course("1","数据结构");
coursesToSelect.add(cr1);
Course temp=(Course)courseToSelect.get(0);
System.out.println("添加了课程"+temp.id+":"+temp.name);
}
public static void main(String[] args) {
ListTest It =new ListTest();
It.testAdd();
}
}
