#Maven Project

36 messages · Page 1 of 1 (latest)

unborn sonnet
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java.lang.NullPointerException

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unborn sonnet
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Can anyone help me through this error

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jolly trellis
unborn sonnet
jolly trellis
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don't do that but just explain more on where the nullpointer is, what you're doing etc

unborn sonnet
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ok wait I don't know about this rule

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can you atleast look up to a git repo

jolly trellis
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fine but you'll still need to explain what the issue is

unborn sonnet
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Yea sure

jolly trellis
unborn sonnet
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So the context is to make a School management system using maven hibernate mysql

unborn sonnet
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So I totally made the methods, classes organized the directory structure with the help of GPT -4 But I am stuck somewhere and I am helpless

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This is my directory structure

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Hello sir are you there @jolly trellis

jolly trellis
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studentservice is empty?

unborn sonnet
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no its not

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package com.myschool.management.sms.services;


import java.util.List;

import com.myschool.management.sms.dao.StudentI;
import com.myschool.management.sms.models.Course;
import com.myschool.management.sms.models.Student;

public class StudentService implements StudentI {

    private final StudentI studentDAO; // Inject Student DAO

    public StudentService(StudentI studentDAO) {
        this.studentDAO = studentDAO;
    }

    @Override
    public void createStudent(Student student) {
        studentDAO.createStudent(student);
    }

    @Override
    public List<Student> getAllStudents() {
        return studentDAO.getAllStudents();
    }

    @Override
    public Student getStudentByEmail(String email) {
        return studentDAO.getStudentByEmail(email);
    }

    @Override
    public boolean validateStudent(String email, String password) {
        return studentDAO.validateStudent(email, password);
    }

    @Override
    public void registerStudentToCourse(String email, int courseId) {
        studentDAO.registerStudentToCourse(email, courseId);
    }

    @Override
    public List<Course> getStudentCourses(String email) {
        return studentDAO.getStudentCourses(email);
    }
}
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this is my StudentService.java

jolly trellis
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that's not what's in the repo

unborn sonnet
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well I didn't start from the repo

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I have made my own directory and started it from scratch

jolly trellis
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so why did you link me to the repo if it's not your code lol

unborn sonnet
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It is not my code but my assignment

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I didn't upload mine in the github yet that was the reason I though of sending via zip file

jolly trellis
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upload to github so we can see what your specific issue is

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but anyway i suspect you are not creatingthe dao correctly and so studentdao is null

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make sure studentdao isn't null by passing it in correctly as a constructor argument

unborn sonnet
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Ok Let me try and come up to you thank you

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