Article competition on JavaRush. Digest #1: October 2-8

Hello, this is the JavaRush team. The first week of the autumn creative competition is behind us . It’s great that this time it aroused such interest: we received a number of interesting articles / theory and practice of Java and personal experience in programming. So we recommend making a cup of tea/coffee and supplementing your Monday lunchtime with posts from the JavaRush digest. User Viacheslav (St. Petersburg), an active member of the community, was the first to respond to the announcement of the competition and has already published three review materials:

UML: from theory to practice

If you want to smoothly implement the structure of an application or process, draw it. And if you need a universal “visual” that will be understood by dozens, hundreds (we count further) of other people, use UML (unified modeling language). The article outlines the basics of the international language of graphic description and examples of its use. You will also find sources of additional useful reading on the topic.

Probability theory in practice or do you know about Random

Another article from Vyacheslav is devoted to probability theory. Random numbers are not random, especially in programming, and the author explains why this is so. Although the Random mechanism seems simple at first glance, there are nuances in its use that do not always play into the hands of the programmer.

For and For-Each loop: a story about how I iterated, iterated, but didn’t iterate

In the material, the author examined the use cases for and for-each and some changes in the operation of iterators in different versions of Java. We recommend reading it, because this topic can be discussed again and again (again and again).

How to find a job in IT if you have completed 20 levels of JavaRush

In the video story, Anna Yushina (St. Petersburg) shared her experience of finding a job from the point of view of a beginner and an ex-humanitarian :) There are not many offers in development for the junior level, so you need to remember. Anna has prepared top 5 tips for beginning programmers that will help you feel more confident both in interviews and at work at first.

JPA Entities and DB Relationships

Nikita Koliadin (Dnepr) dug into the topic for advanced readers. In the article, he examined the types of relationships in relational databases and explained how to use them in ORM (Object-Relational Mapping) using the example of a specially written test project. The result was useful and lively material.

Modifiers or how to cast enchantments in Java

There is a little magic in programming and its ability to create “something” out of thin air, says Petr Gorskin (Moscow). To participate in the competition, he wrote a detailed material about class modifiers - with visual diagrams and analogies. For beginning Javaists who want to understand the basis of this topic, the material will be useful. We can also congratulate Nina Mozharskaya (Kiev) on the “premiere”. The aspiring student prepared two concise posts: “ for each vs for: use cases ” and “ The StringBuilder class in Java with a practical example .” Who will be the winner this time? There is still a week ahead, so we are looking forward to new works. Let us remind you: participants will receive two prizes on behalf of the community, so go to the Random group , like the materials you like and comment on the most interesting posts. Better yet, be brave and... write!