我有3个类:Course
,CourseEntry
和Transcript
。在谈话,我有一个函数来添加课程,这样的:其他类的对象 - 对象 - Java
public class Transcript {
CourseEntry coursestaken[] = new CourseEntry[6];
public void addCourse(Course course)
{
coursestaken[lastIndexOf(getCoursestaken())] = new CourseEntry(course);
}
(lastIndexOf gives me the empty array index - it's working on)
在我CourseEntry
:
public class CourseEntry {
Course course;
char grade = 'I';
public CourseEntry(Course course)
{
this.course = course;
}
在我Course
:
public class Course {
int courseNumber,credits;
String courseName;
public Course addNewCourse(int courseNumber, int credits, String courseName)
{
this.courseNumber = courseNumber;
this.credits = credits;
this.courseName = courseName;
return this;
}
在我的主:
Transcript t = new Transcript();
Course course = new Course();
Course matematik = course.addNewCourse(1, 2, "Matematik");
t.addCourse(matematik);
Course turkce = course.addNewCourse(1, 4, "Türkçe");
t.addCourse(turkce);
但是,如果我循环coursestaken数组,它会打印最后插入的所有索引。
我该如何解决呢?
感谢
'Course.addNewCourse' *变异/修改/更新*当前对象(并不会“添加”到任何东西)。相反,删除该方法并使用'new Course'(构造函数应更新为courseNumber,credits,courseName),然后将* new * Course对象添加到Transcript。 – 2013-01-15 21:02:16
请包括循环代码以及堆栈跟踪 – amphibient
哇读,代码真的伤害了我的大脑 –