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Professor Hans Noodles
CodeGym
2 April 2019 11:48
Here they are: meet the exciting new CodeGym Quests!
Greetings, friends! You’ve waited for this event for so long. You asked us “When it happens??” again and again. The answer is: today is the day X and we are happy to present you a new… no, two brand new Quests of CodeGym at once! That means you will get 323 new fascinating lectures and 565 coding tasks...
SOUFIANE DAHIMI
Random
30 March 2019 11:26
How can I apply for a java programmer job?!
I have been learning JAVA for almost two years before I got regestered into the CODEGYM site, therefore I think that i have enough skills to apply for a junior developer job. In fact I know about java basics, OOP (Abstraction, encapsulation, inheritance, and polymorphism...)...
Collin M
Random
27 March 2019 18:34
For how long do we need to wait?
When will CodeGym unlock multithreading and collections quests? This is the greatest learning site for java programmers, but it's no longer going to be that great if we wait for a long time to get a new quest in this fast changing world of technology.
Jesse Haniel
Java IO & NIO
26 March 2019 14:42
Practice working with the BuffreredReader and InputStreamReader classes
Hi! Today's lesson will be divided into two parts for convenience. We'll repeat some old topics that we touched on previously, and we'll consider some new features :) Let's start with the first one...
Pavlo Plynko
Design Patterns in Java
25 March 2019 14:09
Adapter design pattern
Hi! Today we will touch on an important new topic: design patterns. What are these patterns? I think you must know the expression "don't reinvent the wheel". In programming, as in many other areas, there are a large number of common situations. As software development has evolved...
Alex Vypirailenko
Java IO & NIO
23 March 2019 12:35
Input/output in Java. FileInputStream, FileOutputStream, and BufferedInputStream classes
"Hi! In today's lesson, we'll continue our conversation about input and output streams in Java (Java I/O). This is not the first lesson on this topic, and it certainly won't be the last :) As it happens, the Java language provides many ways...
Volodymyr Portianko
Serialization in Java
22 March 2019 15:11
Externalizable interface in Java
Hi! Today we'll continue to get to know serialization and deserialization of Java objects. In the last lesson, we got to know the Serializable marker interface, reviewed examples of its use, and also learned how you can use the transient keyword to control the serialization process...
Volodymyr Portianko
Multithreading in Java
22 March 2019 13:39
Managing threads. The volatile keyword and the yield() method
Hi! We continue our study of multithreading. Today we'll get to know the volatile keyword and the yield() method. Let's dive in :) When creating multithreaded applications, we can run into two serious problems. First, when a multithreaded application is running, different threads can cache ...
Jesse Haniel
Multithreading in Java
22 March 2019 13:01
Thread synchronization. The synchronized operator
Hi! Today we'll continue to consider the features of multithreaded programming and talk about thread synchronization. What is 'synchronization'? Outside of the programming domain, it implies an arrangement that allows two devices or programs to work together. For example, a smartphone and computer...
Pavlo Plynko
Multithreading in Java
22 March 2019 12:00
Multithreading: What the methods of the Thread class do
Hi! Today we'll continue to talk about multithreading. Let's examine the Thread class and what a few of its methods do. When we studied class methods previously, we usually just wrote this: -> . This won't work with Thread's methods :) ...
Pavlo Plynko
Java Objects
21 March 2019 15:33
Sequence of actions during object creation
Hi! Today's lesson will be quite... uh... multifaceted :) in the sense that we will cover a wide range of topics, but they will all relate to the object creation process. We will analyze it from beginning to end: how constructors are called, how and in what order fields (including static fields) are initialized, etc...
John Selawsky
Inheritance in Java
20 March 2019 12:15
Widening and narrowing of reference types
Hi! In a past lesson, we discussed casting primitive types. Let's briefly recall what was discussed. We imagined primitive types (in this case, numeric types) as nesting dolls that vary in size according to the amount of memory they occupy...
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