All Questions
46
questions
1
vote
1
answer
97
views
Take meal orders from breakfast, lunch and dinner menus
I have an exercise requires me to write a service to management menu.
The requirement like this:
Food menu includes: breakfast menu, lunch menu, dinner menu. The three menu haves list menu item( name, ...
- 21
1
vote
1
answer
102
views
Java: Using one class or algebraic data types to model different state?
I'm creating a tool to analyze a card game which is played by three players. A Card is associated with a number of points and looks like this:
...
- 11
-1
votes
2
answers
183
views
A simple java game engine [closed]
I'm starting an object orientated game engine in Java. My plans for the engine is to be able to split things easily into multi-core loads. My idea is that a Unique (interface with a ...
- 185
2
votes
2
answers
85
views
Registering listeners according to SOLID pricipals
I'm practicing oop concepts these days. To figure it out I tried the below problem.
There is a sensor monitoring system. It is a simple system that prints a value, ...
7
votes
2
answers
146
views
Refactoring validator system
I've validator system that validates input data before saving to DB.
So let's say I want to create new user.
We are at the service class:
...
- 71
3
votes
3
answers
584
views
Returning interfaces in Java without significant casting
I am writing some code that takes and returns interfaces following the patterns in Effective Java Third Edition. I understand the principle - we want to take in interfaces because in many cases we don'...
- 133
1
vote
0
answers
65
views
Code for creating a dialog for choosing a date
I have code that creates an AlertDialog to select a date by a user. I ran into a problem that this code began to take up a lot of space. Could you offer ideas on how to shorten this code / put it into ...
- 477
6
votes
2
answers
264
views
0
votes
3
answers
105
views
"Human" interfaces with two implementation classes
The Helloworld class executes all of the methods. Human is the interface, and Nate & <...
- 3
0
votes
1
answer
87
views
Using a wrapper on a primitive as a generic for an interface used for Java lambda
I apologize for that title, lol.
I have a Java method that I'm writing where I want to be able to pass in an array of Objects and two interfaces that will be used for lambda expressions that specify ...
- 113
2
votes
1
answer
3k
views
Implementation of generic unordered list in java
This question is a follow-up question of this question. These features are added to the new class -
Generic class
User is capable of setting the size
...
- 145
1
vote
2
answers
2k
views
Creating a Student class for a project
To recover from yesterday's disaster, I re-read the SOLID principles and refactored my code. Hopefully I did a better job than yesterday. I wanted to keep my Student...
user150904
4
votes
2
answers
2k
views
Implementing an HotelManager interface in Java
Got a mission to implement an Hotel Manager interface.
I will post the interface and the attached class Reservation, and will add my code.
What I am asking you is ...
- 149
1
vote
1
answer
101
views
Passing some redundant parameters to an interface vs creating a new request object every time for the interface
I am writing a proxy class, that will fetch a certain property (say propertyA) by calling an underlying service.
Currently we use Service A to get propertyA, but there is a chance that in the near ...
- 113
3
votes
3
answers
5k
views
OOP modelling of a car agency
Exercise:
A car dealer wants a computer system to manage the data of their vehicles and classify them by type.
All cars have the following data
Engine serial number
Brand
Year
...
- 393