— Хей, войнико!
— Добър ден, капитане!
„Имам страхотни новини за вас. Ето няколко упражнения за укрепване на уменията ви. Правете ги всеки ден и уменията ви ще растат с безумна скорост. Те са създадени специално за IntelliJ IDEA.“
„Тези предишни упражнения бяха за новобранци. Добавих някои по-напреднали бонус упражнения за старите хора. Само за ветерани.“
8
Задача
Java Core, ниво, урок
Bridges
Create a Bridge interface with a getCarsCount() method that counts cars. Write WaterBridge and SuspensionBridge classes that implement this interface. The getCarsCount() method must return any constant int value. This value must be different for different classes.
8
Задача
Java Core, ниво, урок
Wine tasting
30% of the robots on Planet Soto have an alcohol dependence, which causes anxiety among the remaining 70%. More precisely, the 30% are addicted to alcohol-related programs. We are talking about robots, after all. But now it's your chance to do the same!
16
Задача
Java Core, ниво, урок
User, loser, coder and programmer
1. Enter a few strings (keys) from the keyboard [in a loop].
The following strings (keys) are allowed: "user", "loser", "coder", "programmer".
Stop reading in strings after reading in any string that does not match one of the above.
2. For each entered string:
2.1. Create the appropriate object [see Person.java], e.g.
4
Задача
Java Core, ниво, урок
Implement the printMainInfo method
Write an implementation of the printMainInfo method:
* If a Drawable object is passed to the method, call the draw method on the object.
* If a Movable object is passed to the method, call the move method on the object.
8
Задача
Java Core, ниво, урок
Computer
We're using programming and OOP tools to build a new computer for work. We won't just have a Computer class. We'll also have a CompItem interface that will be implemented by the Computer class.
16
Задача
Java Core, ниво, урок
MovieFactory
You have the code for a MovieFactory program. Figure out what it does. Add Cartoon and Thriller classes. Understand how we get a SoapOpera object using the key "soapOpera".
8
Задача
Java Core, ниво, урок
Janitorial services
Let's create a virtual janitorial business with a cleanAllApartments method for all apartment types and individual methods for cleaning one-, two- and three-bedroom apartments.
8
Задача
Java Core, ниво, урок
Fixing bugs
Think about how CanSwim and CanWalk interfaces relate to the SeaCreature class. Create the correct inheritance relationship between the interfaces and the SeaCreature class. And how might the Orca, Whale, and RiverOtter classes relate to the SeaCreature class?
16
Задача
Java Core, ниво, урок
Currencies
Let's do some work with money. Your job is to expand the functionality of a program that can manipulate currencies. For the specific currencies, see the task conditions. To start, create a private double field amount in the abstract Money class...
8
Задача
Java Core, ниво, урок
Fix four mistakes
This code has four bugs, and your task is... Yeah, you already know what your task is. First of all, you need to figure out what the code does. Create something and fix the bugs that were written before you got involved with the code (as well as any that appear after you get involved).
8
Задача
Java Core, ниво, урок
Exception invasion
In reality, there are oceans of exceptions in programs, and you'll eventually get used to them. You can start right now: populate the list exceptions with ten (10) different exceptions. The first exception is already implemented in the initExceptions method.
16
Задача
Java Core, ниво, урок
GCD
We continue our attempts to enter the cosmic space belonging to Planet Linear Chaos. Here's another task taken from a border-crossing interview, for young arrivals: find the greatest common divisor (GCD) of two positive integers.
8
Задача
Java Core, ниво, урок
Singleton
A class implements the Singleton pattern if it lets you create just one object of its type. You need to create a Singleton class in a separate file. Add a static getInstance method that returns the same object any time it is called. Think about how you can prevent the creation of additional instances of this class.