Objects-Instances of classes

Class - a blueprint for creating objects with same behavior and defined attributes
Object - specific entry made from a class, individual instances of classes with variables used to name them, can be manipulated in the program
Has behaviors and attributes defined by the class used to create it
They do not have an impact on one another (different objects)
Can have 2 variables for one object
Changing one will change both variables
Constructors are used to initialize the attributes for an object

// I made an algorithm to calculate the 5 number summary that we use in AP Statistics. It uses the round() Math method (even though that technically makes it less accurate). 

import java.util.Scanner;  // Import the Scanner class
import java.util.ArrayList; // Import the ArrayList class
import java.util.Collections; // // Sort myData


class Main { // Defining the class 
  public static void main(String[] args) {
    ArrayList<Integer> myData = new ArrayList<Integer>(); // Integer is a wrapper class
// Create an ArrayList object
    Scanner firstData = new Scanner(System.in);  // Create a Scanner object
    System.out.println("Enter a point of data");
    myData.add (firstData.nextInt());  // Read user input
    
    System.out.println("Data Inputted:" + myData);

    String response = "y";
    while (response.equals("y")) { // Use of the equals() String method
    
    Scanner userResponse = new Scanner(System.in);  // Create a Scanner object
    System.out.println("Enter more data? (y/n)");

    response = userResponse.nextLine();
    if (response.equals("y")){
      Scanner Data = new Scanner(System.in);  // Create a Scanner object
    System.out.println("Enter a point of data");
    myData.add (Data.nextInt());  // Read user input
    System.out.println("Data Inputted:" + myData);

    
  }
    }

    Collections.sort(myData);
    int last = myData.size();
    System.out.println("Minimum: " + myData.get(0));
    System.out.println("Q1: " + myData.get(Math.round((last-1)/4))); // Use the the round() Math method
    System.out.println("Median: " + myData.get(Math.round((last-1)/2))); // Use the the round() Math method
    System.out.println("Q3: " + myData.get(Math.round((last-1) *3/4))); // Use the the round() Math method
    System.out.println("Maximum: " + myData.get(last-1));
    
    
  }
}

Main.main(null);

Enter a point of data
Data Inputted:[1]
Enter more data? (y/n)
Enter a point of data
Data Inputted:[1, 3]
Enter more data? (y/n)
Enter a point of data
Data Inputted:[1, 3, 5]
Enter more data? (y/n)
Minimum: 1
Q1: 1
Median: 3
Q3: 3
Maximum: 5