Lesson 1.7 Homework

Popcorn Hack 1

import java.util.ArrayList;
import java.lang.Math;

public class PopcornHack1 {
    public static void main(String[] args) {
        double power = Math.pow(3, 4);

        double root = Math.sqrt(64);

        ArrayList<String> lst = new ArrayList<>();
        
        lst.add("red");
        lst.add("green");
        lst.add("blue");
        
        System.out.println("Amount of colors: " + lst.size());
    }
}

PopcornHack1.main(null);

Amount of colors: 3

Popcorn Hack 2

public class Book {
    private String title;
    private String author;
    private int pages;

    Book(String title, String author, int pages) {
        this.title = title;
        this.author = author;
        this.pages = pages;
    }

    public void displayInfo() {
        System.out.println("Title: " + this.title);
        System.out.println("Author: " + this.author);
        System.out.println("Pages: " + this.pages);
    }

    public boolean isLong() {
        if (this.pages >= 300) {
            return true;
        }
        else {
            return false;
        }
    }
}

Book book = new Book("Good & Evil", "Tally Hall", 14);

book.displayInfo();

if (book.isLong()) {
    System.out.println("This book is very long.");
}
else {
    System.out.println("This book is not long.");
}

Title: Good & Evil
Author: Tally Hall
Pages: 14
This book is not long.

Homework Hack

import java.util.ArrayList;
import java.lang.Math;

class Phone {
    private String brand;
    private String model;
    private double battery;
    private ArrayList<String> contacts;

    Phone(String brand, String model) {
        this.brand = brand;
        this.model = model;
        this.battery = 100;
        this.contacts = new ArrayList<>();

        System.out.println("New Phone Initialized");
        System.out.println("");
        System.out.println("");
    }

    public void displayInfo() {
        System.out.println("Grabbed Phone Information");

        System.out.println("");

        System.out.println("Brand: " + this.brand);
        System.out.println("Model: " + this.model);
        System.out.println("");
    }

    public void addContact(String person) {
        System.out.println("Add " + person + " to contacts");
        System.out.println("");

        this.contacts.add(person);
    }

    public void showContacts() {
        System.out.println("Contacts:");

        for (int i = 0; i <= this.contacts.size()-1; i++) {
            System.out.println(this.contacts.get(i));
        }

        System.out.println("");
    }

    public void usePhone(int minutes) {
        double base = 100.0;
        double usage = base * Math.pow(0.99, minutes);

        double diff = battery - usage;

        System.out.println("Used Phone for " + minutes + " minute(s) and lost " + (int)diff + "% of Battery");

        this.battery = usage;

        System.out.println("");
    }
}



public class PhoneTest {
    public static void main(String[] args) {
        Phone phone1 = new Phone("Android", "74KA");

        phone1.addContact("Sandra");
        phone1.addContact("Carl");
        phone1.addContact("Mr.");
        phone1.showContacts();

        phone1.usePhone(10);

        phone1.displayInfo();

        Phone phone2 = new Phone("Apple", "61M");
        
        phone1.addContact("Bullock");
        phone1.addContact("Smite");
        phone1.addContact(" McCarsman");
        phone1.showContacts();

        phone1.usePhone(60);

        phone1.displayInfo();
        
    }
}

PhoneTest.main(null);

New Phone Initialized


Add Sandra to contacts

Add Carl to contacts

Add Mr. to contacts

Contacts:
Sandra
Carl
Mr.

Used Phone for 10 minute(s) and lost 9% of Battery

Grabbed Phone Information

Brand: Android
Model: 74KA

New Phone Initialized


Add Bullock to contacts

Add Smite to contacts

Add  McCarsman to contacts

Contacts:
Sandra
Carl
Mr.
Bullock
Smite
 McCarsman

Used Phone for 60 minute(s) and lost 35% of Battery

Grabbed Phone Information

Brand: Android
Model: 74KA