这是我第一次尝试在Java中创建对象数组。 我的代码是一个热门的混乱，充满了愚蠢的初学者错误。
package javaapplication62;
import java.util.Scanner;
public class JavaApplication62 {
public static void main(String[] args) {
while (true) {
Scanner in = new Scanner(System.in);
System.out.println("1.Enroll Student");
System.out.println("2.Offer Course");
String name = in.next();
int choice = in.nextInt();
if (choice == 1) {
student_class[] studentList = new student_class[500];
studentList[0] = new student_class();
while (true) {
System.out.print(" Enter name of the student: ");
studentList[0].setName(in.next());
System.out.println("");
System.out.print(" The student is given the unique ID = " + studentList[0].getUniqueStudentID() + " and the number of students = " + studentList[0].getNumberOfStudents());
System.out.print("> and the number of students : ");
studentList[0].setnumberOfStudents(in.nextInt);
System.out.println("");
System.out.print(" Enter the e-mail address of the student: ");
studentList[0].setemail(in.next);
System.out.print("Enter the semester number of the student: ");
studentList[0].setsemesterNumber(in.nextInt);
System.out.print(" Add another student (Y/N): ");
char add = in.next().charAt(0);
if (add == 'Y' || add == 'y') {
}
if (add == 'N' || add == 'n') {
break;
}
}
} else if (choice == 2) {
while (true) {
Course[] courseOfferedList;
courseOfferedList = new Course[500];
courseOfferedList[0] = new Course();
System.out.println("Enter the course code : ");
courseOfferedList[0].setCourseCode(in.next());
System.out.println(" Enter the course title: ");
courseOfferedList[0].setCourseTitl(in.next());
System.out.println(" Enter the credit hours of the course: ");
courseOfferedList[0].setCreditHours(in.nextInt());
System.out.print(" Add another course (Y/N): ");
char add2 = in.next().charAt(0);
if (add2 == 'Y' || add2 == 'y') {
}
if (add2 == 'N' || add2 == 'n') {
break;
}
}
}
}
}
}
学生班。
public class student_class {
private String name;
private int uniqueStudentID;
private String email;
private int mobileNumber;
private int semesterNumber;
static int numberOfStudents = 0;
public student_class() {
name = null;
uniqueStudentID = 0;
email = null;
mobileNumber = 0;
semesterNumber = 0;
numberOfStudents++;
}
public void setName(String name) {
this.name = name;
}
public void setUniqueStudentID(int uniqueStudentID) {
this.uniqueStudentID = uniqueStudentID;
}
public void setEmail(String email) {
this.email = email;
}
public void setMobileNumber(int mobileNumber) {
this.mobileNumber = mobileNumber;
}
public void setSemesterNumber(int semesterNumber) {
this.semesterNumber = semesterNumber;
}
public void setNumberOfStudents(int numberOfStudents) {
this.numberOfStudents = numberOfStudents;
}
public String getName() {
return name;
}
public int getUniqueStudentID() {
return uniqueStudentID;
}
public String getEmail() {
return email;
}
public int getMobileNumber() {
return mobileNumber;
}
public int getSemesterNumber() {
return semesterNumber;
}
public int getNumberOfStudents() {
return numberOfStudents;
}
void setName() {
}
void setuniqueStudentID() {
}
void setnumberOfStudents() {
}
void setsemesterNumber() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
void setmobileNumber() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
void setemail() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
课程类：
public class Course {
private int courseCode;
private String courseTitl;
private int creditHours;
static int numberOfCourses = 0;
public int getCourseCode() {
return courseCode;
}
public void setCourseCode(int courseCode) {
this.courseCode = courseCode;
}
public String getCourseTitl() {
return courseTitl;
}
public void setCourseTitl(String courseTitl) {
this.courseTitl = courseTitl;
}
public int getCreditHours() {
return creditHours;
}
public void setCreditHours(int creditHours) {
this.creditHours = creditHours;
}
public static int getNumberOfCourses() {
return numberOfCourses;
}
public static void setNumberOfCourses(int numberOfCourses) {
Course.numberOfCourses = numberOfCourses;
}}
每次我运行它时都会显示错误：
Exception in thread "main" java.lang.UnsupportedOperationException: Not supported yet.
at javaapplication62.student_class.setName(student_class.java:11)
at javaapplication62.JavaApplication62.main(JavaApplication62.java:29)
Java Result:
这就是我想要的输出
＆GT;用于输入和＆lt;用于输出
{Display the menu, Choose the menu item}
> 1
> Enter name of the student: john
< The student is given the unique ID = 1 and the number of students = 1
> Enter the e-mail address of the student: john@stu.fau.edu.uk
> Enter the semester number of the student: 3
> Add another student (Y/N): Y
> Enter name of the student: Ibrahim
< The student is given the unique ID = 2 and the number of students = 2
> Enter the e-mail address of the student: Ibrahim@stu.fau.edu.uk
> Enter the semester number of the student: 3
> Add another student (Y/N): N
{Display the menu, Choose the menu item}
> 2
> Enter the course code: CPCS203
> Enter the course title: Programming 2
> Enter the credit hours of the course: 4
> Add another course (Y/N): Y
> Enter the course code: CPCS204
> Enter the course title: Data Structures
> Enter the credit hours of the course: 3
> Add another course (Y/N): N
{Display the menu, Choose the menu item}
答案 0 :(得分：1)
您的大多数错误都在canvas {
border: 1px solid black;
height: 300px;
width: 300px;
position:relative;
}
#message {
position:absolute;
top:150px;
left:100px;
}
课程中。我已经纠正它们以获得您想要的所需输出。您的所有课程仍然存在许多问题。我会把这件事留给你纠正。
查看更正的评论。
JavaApplication62此外，我还没有改进你的缩进。你也应该看一下。
这将为您提供问题中提到的输出。但我认为你应该完全重构你的很多代码。