我有一个问题，即使输入了信息，当要求显示它（选项6）时，它也不会显示从选项6输入的信息。我感觉像是它的原因是我无法在courseModule类中添加super（courseName） 。非常感谢您的帮助，请在下面留下所有相关代码。
AppMain类
import java.util.*;
public class AppMain {
// ArrayList of students
private static ArrayList<Student> studentList = new ArrayList<Student>();
// ArrayList of teachers
private static ArrayList<Teacher> teacherList = new ArrayList<Teacher>();
// ArrayList of Modules
private static ArrayList<CourseModule> ModuleList = new ArrayList<CourseModule>();
public static void main(String[] args)
{
menu();
}
public static void menu()
{
int option = 0;
while(option != 7) {
Scanner in = new Scanner(System.in);
// Creates main menu
System.out.println("Choose an option.");
System.out.println("[1] Create student");
System.out.println("[2] Display students");
System.out.println("[3] Create Teacher");
System.out.println("[4] Display Teachers");
System.out.println("[5] Create Module");
System.out.println("[6] Display Modules");
System.out.println("[7] Exit");
System.out.print("Option? ");
option = in.nextInt();
// Switch case for dealing with choice
// Each case is braced {} so convinient variable names can be reused..
// .. without fear of variables 'carrying over'
switch (option) {
case 1: {
String name;
int grade;
System.out.println("Enter name: ");
in.nextLine(); // Stops the program 'running' over the next line
name = in.nextLine();
System.out.println("Enter grade: ");
grade = in.nextInt();
if (grade <= 100 && grade >= 0) {
Student student = new Student(name, grade);
studentList.add(student);
//error message
} else {
System.out.println("Grade not in boundaries!\nUser not added \nEnter grade between 0-100.");
}
break;
}
case 2: {
Iterator<Student> itr = studentList.iterator();
while (itr.hasNext()) {
Student student = itr.next();
System.out.println(student.toString() + "\n");
}
break;
}
case 3: {
String name;
System.out.println("Enter Teachers name: ");
in.nextLine();
name = in.nextLine();
Teacher teacher = new Teacher(name);
teacherList.add(teacher);
break;
}
case 4: {
// Iterators through the teachList ArrayList..
// .. and prints each one with a line between
Iterator<Teacher> itr = teacherList.iterator();
while (itr.hasNext()) {
Teacher teacher = itr.next();
System.out.println(teacher.toString() + "\n");
}
break;
}
case 5: {
String name;
String courseName; // defining module String
System.out.println("Enter Teachers name: ");
in.nextLine();
name = in.nextLine();
Teacher teacher = new Teacher(name);
teacherList.add(teacher);
System.out.println("Enter Module Name: ");
courseName = in.nextLine();
CourseModule Module = new CourseModule(courseName, teacher);
ModuleList.add(Module);
break;
}
case 6: {
// Iterator<Teacher> itr = teacherList.iterator();
// while (itr.hasNext()) {
// Teacher teacher = itr.next();
// System.out.println(teacher.toString() + "\n");
// }
Iterator<CourseModule> itr = ModuleList.iterator();
while (itr.hasNext()) {
CourseModule Module = itr.next();
System.out.println(Module.toString() + "\n");
}
这是CourseModule类
import java.util.*;
public class CourseModule implements Course {
String courseName;
Teacher teacher;
ArrayList<Student> students = new ArrayList<Student>();
public CourseModule (String courseName, Teacher teacher) {
}
@Override
public void assignTeacher(Teacher teacher) {
}
@Override
public void enrolStudent(Student student) {
}
我觉得它与CourseModule公共courseModule有关，但是我尝试过的所有方法都不起作用，任何帮助都被困了30分钟而在其他地方却无济于事
最佳答案
您的构造函数中没有代码，因此更改为
public CourseModule (String courseName, Teacher teacher) {
this.courseName = courseName;
this.teacher = teacher;
}
在某个阶段，您也需要填写其他方法