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我是一名學生，正在尋找幫助完成作業。這是任務：創建一個CollegeCourse類。該課程包含課程編號（例如「CIS 210」），學分（例如3）和字母等級（例如「A」）等字段。Java將類數組傳入數組
包括每個字段的get（）和set（）方法。創建一個包含一個ID號的學生類和一個由五個CollegeCourse對象組成的數組。爲學號ID創建一個get（）和set（）方法。還要創建一個返回學生的CollegeCourses之一的get（）方法;該方法接受一個整數參數並返回該位置的CollegeCourse（0到4）。接下來，創建一個set（）方法來設置一個Student's CollegeCourses的值;該方法需要兩個參數 - 一個CollegeCourse和一個表示CollegeCourse的位置的整數（0到4）。
我得到了第二個for循環的運行時錯誤，我試圖將數據放入課程數組中。它要求同一行中的CourseID和小時數，並且不管我對它做出什麼響應，我收到一個錯誤，它幾乎看起來像試圖在同一時間獲取所有數組變量。這是我的代碼，其中包括三個類。任何幫助我向正確的方向發送我的讚賞，因爲我已經花了很長時間已經研究解決。
public class CollegeCourse {
private String courseId;
private int creditHours;
private char grade;
public CollegeCourse(String id, int hours, char grade)
{
courseId=id;
creditHours = hours;
this.grade = grade;
}
public void setCourseId(String id)
{
courseId = id;//Assign course id to local variable
}
public String getCourseId()
{
return courseId;//Provide access to course id
}
public void setHours(int hours)
{
creditHours = hours;//Assign course id to local variable
}
public int getHours()
{
return creditHours;//Provide access to course id
}
public void setGrade(char grade)
{
this.grade = grade;//Assign course id to local variable
}
public char getGrade()
{
return grade;//Provide access to course id
}
}
學生班級
public class Student {
final int NUM_COURSES = 5;
private int studentId;
private CollegeCourse courseAdd;//Declares a course object
private CollegeCourse[] courses = new CollegeCourse[NUM_COURSES];
//constructor using user input
public Student(int studentId)
{
this.studentId=studentId;
}
public void setStudentId(int id)
{
studentId = id;//Assign course id to local variable
}
public int getStudentId()
{
return studentId;//Provide access to course id
}
public void setCourse(int index, CollegeCourse course)
{
courses[index] = course;
}
public CollegeCourse getCourse(int index)
{
return courses[index];
//do I need code to return the courseId hours, grade
}
}
InputGrades類
import java.util.Scanner;
public class InputGrades {
public static void main(String[] args) {
final int NUM_STUDENTS = 2;
final int NUM_COURSES = 3;
Student[] students = new Student[NUM_STUDENTS];
int s;//subscript to display the students
int c;//subscript to display courses
int stId;
int csIndex;
String courseId = "";
int hours = 0;
//String gradeInput;
char grade = 'z';
CollegeCourse course = new CollegeCourse(courseId,hours, grade);//not sure if I am handling this correctly
Scanner input = new Scanner(System.in);
for(s = 0; s<NUM_STUDENTS; ++s)
{
students[s] = new Student(s);
System.out.print("Enter ID for student #" + (s+1) + ":");
stId = input.nextInt();
input.nextLine();
students[s].setStudentId(stId);
for(c=0; c < NUM_COURSES; ++c)
{
csIndex=c;
System.out.print("Enter course ID #" + (c+1) + ":");
courseId = input.nextLine();
course.setCourseId(courseId);
System.out.print("Enter hours:");
hours = input.nextInt();
input.nextLine();
course.setHours(hours);
String enteredGrade = "";
while(enteredGrade.length()!=1) {
System.out.print("Enter grade:");
enteredGrade = input.nextLine();
if(enteredGrade.length()==1) {
grade = enteredGrade.charAt(0);
} else {
System.out.println("Type only one character!");
}
}
course.setGrade(grade);
students[s].setCourse(csIndex, course);
}
}
for(s = 0; s<NUM_STUDENTS; ++s)
{
System.out.print("\nStudent# " +
students[s].getStudentId());
System.out.println();
for(c=0;c<NUM_COURSES;++c)
System.out.print(students[s].getCourse(c) + " ");
System.out.println();
}
}
}
你有什麼錯誤？ – xro7
拋出什麼異常？ –
你可以發佈錯誤的完整Stactrace，並可能指出它發生在哪一行？這將有很大的幫助 – Gumbo