Examination management software for school In Java.

Let's create a simple examination management software for a school in Java. This software will allow you to manage student records, enter examination marks, calculate grades, and generate reports. Here's an example implementation to get you started:

```java

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

class Student {

    private int studentId;

    private String name;

    private List<Integer> marks;

    public Student(int studentId, String name) {

        this.studentId = studentId;

        this.name = name;

        this.marks = new ArrayList<>();

    }

    public int getStudentId() {

        return studentId;

    }

    public String getName() {

        return name;

    }

    public List<Integer> getMarks() {

        return marks;

    }

    public void addMark(int mark) {

        marks.add(mark);

    }

}

public class ExaminationManager {

    private List<Student> students;

    public ExaminationManager() {

        this.students = new ArrayList<>();

    }

    public void addStudent(int studentId, String name) {

        Student student = new Student(studentId, name);

        students.add(student);

        System.out.println("Student added: " + studentId + " - " + name);

    }

    public void enterMarks(int studentId, int[] marks) {

        Student student = findStudent(studentId);

        if (student != null) {

            for (int mark : marks) {

                student.addMark(mark);

            }

            System.out.println("Marks entered for student: " + studentId);

        } else {

            System.out.println("Student not found.");

        }

    }

    public void calculateGrades() {

        for (Student student : students) {

            List<Integer> marks = student.getMarks();

            int totalMarks = 0;

            for (int mark : marks) {

                totalMarks += mark;

            }

            int averageMarks = totalMarks / marks.size();

            String grade = calculateGrade(averageMarks);

            System.out.println("Student: " + student.getName());

            System.out.println("Average Marks: " + averageMarks);

            System.out.println("Grade: " + grade);

        }

    }

    public void generateReport(int studentId) {

        Student student = findStudent(studentId);

        if (student != null) {

            System.out.println("Student Report");

            System.out.println("Student ID: " + student.getStudentId());

            System.out.println("Name: " + student.getName());

            System.out.println("Marks: " + student.getMarks());

            int totalMarks = 0;

            for (int mark : student.getMarks()) {

                totalMarks += mark;

            }

            int averageMarks = totalMarks / student.getMarks().size();

            String grade = calculateGrade(averageMarks);

            System.out.println("Average Marks: " + averageMarks);

            System.out.println("Grade: " + grade);

        } else {

            System.out.println("Student not found.");

        }

    }

    private Student findStudent(int studentId) {

        for (Student student : students) {

            if (student.getStudentId() == studentId) {

                return student;

            }

        }

        return null;

    }

    private String calculateGrade(int averageMarks) {

        if (averageMarks >= 90) {

            return "A+";

        } else if (averageMarks >= 80) {

            return "A";

        } else if (averageMarks >= 70) {

            return "B";

        } else if (averageMarks >= 60) {

            return "C";

        } else if (averageMarks >= 50) {

            return "D";

        } else {

            return "F";