Привет всем, я пытаюсь решить эту домашнюю работу JAVA для класса, и я застрял в течение большей части дня, пытаясь заставить мой конструктор GPA предоставить мне правильный результат.
Мне нужен выводимя студента и его средний балл.В настоящее время имя и фамилия печатаются правильно, но для GPA я получаю значение Null, и сейчас я, кажется, получаю только ссылку на него.
Это мой основной код класса
package assignment2;
/**
*
* @author javyc
*/
import java.text.NumberFormat;
import java.util.HashSet;
public class Assignment2 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
Classes[]courseArray = new Classes[2];
courseArray[0] = new Classes("Javier", "Ruiz", "Winter 2018", 3);
courseArray[1] = new Classes("Gabriela", "Ruiz", "Fall 2018", 3);
double[] gpa = new double[2];
gpa[0] = 4.00;
gpa[1] = 4.00;
Students ArizonaStudent = new Students("Javier", "Ruiz","MIS", "2020", courseArray, gpa);
gpa = ArizonaStudent.getGpa();
NumberFormat formatting = NumberFormat.getNumberInstance();
formatting.setMaximumFractionDigits(2);
System.out.println(ArizonaStudent.getStudentFirstName()+ " " + ArizonaStudent.getStudentLastName() + "" + gpa);
//System.out.println(ArizonaStudent.getCourses(1));
}
}
Это мой код класса ученика
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package assignment2;
/**
*
* @author javyc
*/
public class Students {
private String studentFirstName;
private String studentLastName;
private String department;
private String gradYear;
private Classes[] courses;
private double[] gpa1;
public Students(String studentFN, String studentLN, String dept, String graduationYear, Classes[]coursesList, double[]gpaList){
studentFirstName = studentFN;
studentLastName = studentLN;
department = dept;
gradYear = graduationYear;
setCourses(coursesList);
setGPA(gpaList);
}
public String getStudentFirstName(){
return studentFirstName;
}
public String getStudentLastName(){
return studentLastName;
}
public String getStudentDepartment(){
return department;
}
public String getStudentGraduationYear(){
return gradYear;
}
public Classes[]getCourses(){
return courses;
}
public double[]getGpa(){
return gpa1;
}
public void setStudentFirstName(String studentFN){
studentFirstName = studentFN;
}
public void setStudentLastName(String studentLN){
studentLastName = studentLN;
}
public void setDepartment(String department){
this.department = department;
}
public void setGraduationYear(String gradYear){
this.gradYear = gradYear;
}
public void setCourses(Classes[]courses){
this.courses=courses;
}
public void setGPA(double[]gpa1){
this.gpa1=gpa1;
}
public class GPA{
public double gradePointAverage(){
int totalCreds = 0;
double gpaTotal = 0.0;
for (int i = 0; i<courses.length;i++){
totalCreds += courses[i].getCredits();
gpaTotal += courses[i].getCredits()* gpa1[i];
return gpaTotal = gpaTotal/totalCreds;
}
return gpaTotal = gpaTotal/totalCreds;
}
}
}
Это код моего класса
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package assignment2;
/**
*
* @author javyc
*/
public class Classes {
//We will start by declaring the attributes of the Classes offered at UA
private String professorFirstName;
private String professorLastName;
private String semesterOffered;
private int creditTotal = 0;
public Classes(String profMainName, String profLastName, String semester, int credits)
{
professorFirstName = profMainName;
professorLastName = profLastName;
semesterOffered = semester;
creditTotal = credits;
}
public String returnFirstName(){
return professorFirstName;
}
public String returnLastName(){
return professorLastName;
}
public String returnSemester(){
return semesterOffered;
}
public int getCredits(){
return creditTotal;
}
public void establishedSemester(String semesterOffered){
this.semesterOffered = semesterOffered;
}
public void establishFirstName(String professorFirstName){
this.professorFirstName = professorFirstName;
}
public void establishLastName(String professorLastName){
this.professorLastName = professorLastName;
}
public void establishCredits(Integer creditTotal){
this.creditTotal = creditTotal;
}
}