Create a Program to Implement Object Oriented Programming in Java Assignment Solution

Instructions

Objective

Write a java assignment program to implement object oriented programming.

Requirements and Specifications

Source Code

import java.io.File; import java.util.Scanner; public class DataStore { private static DataStore instance; private final String SECTIONS_FILENAME = "sections1.txt"; private Section[] sections; private int numSections; // Load the sections from file private DataStore() { sections = new Section[10]; numSections = 0; try { Scanner inFile = new Scanner(new File(SECTIONS_FILENAME)); while (inFile.hasNext()) { String subject = inFile.next(); String number = inFile.next(); String name = inFile.next(); String id = inFile.next(); String days = inFile.next(); String startTime = inFile.next(); String building = inFile.next(); String room = inFile.next(); Section section = new Section(subject, number, name, id, days, startTime, building, room); addSection(section); } inFile.close(); } catch (Exception e) { e.printStackTrace(System.out); System.exit(0); } } // Return a list of sections public Section[] getSections() { Section[] result = new Section[numSections]; for (int i = 0; i < numSections; i++) { result[i] = sections[i]; } return result; } // Add a new section to the data store public void addSection(Section section) { if (numSections >= sections.length) { sections = expandSections(sections); } sections[numSections++] = section; } // Expand the objects twice its size, made it an 'object' instead // of a specific data type to make it more generic and applicable // to other arrays as well if in case we expand this program private Section[] expandSections(Section[] objects) { Section[] newSections = new Section[objects.length * 2]; for (int i = 0; i < objects.length; i++) { newSections[i] = objects[i]; } return newSections; } // Return the only instance of a data store public static DataStore getInstance() { if (instance == null) { instance = new DataStore(); } return instance; } }