How to compile and run Java files on Windows

Posted on July 1, 2023 by Andrej Buday

From time to time, you get into a situation you need to compile and run your Java code, and instead of using any build tool or IDE, you need to do it manually. If you are engaged in software development or writing automated script writing, compiling and executing code from the Windows console should be straightforward and effortless.

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Java concurrency interview conversation about passing shared variables to threads

Posted on June 1, 2023 by Andrej Buday

During one interview, I got a pretty nice Java concurrency interview question. It was more or less a conversation between me and the interviewer about how Java handles Threads and passing references, plus ideas on solving concurrency pitfalls.

Let’s take a while and simulate such a conversation so you can be prepared for your next Java concurrency interview.

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7 different ways how to get NumberFormatException in Java

Posted on May 5, 2022 by Andrej Buday

If you get NumberFormatException in Java, it is highly probable because of the following reasons. This article will uncover the NumberFormatException, how you are getting it and what you should do to handle the exception properly.

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How to figure out if a character in a string is a number

Posted on May 3, 2022 by Andrej Buday

This article will show how to figure out if a character in a string is a number. You might be wondering how to do it. There are multiple ways to determine if an individual or series of characters in the string classify as a number. So let’s look at various approaches for determining if the character is a number.

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Developer Notes 001

Posted on May 1, 2022 by Andrej Buday

This article selects a few developer notes collected during the software development, which were unfortunately not enough for a self-standing article.

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How To Turn Number To String With Padded Space or Zeroes

Posted on April 1, 2022 by Andrej Buday

This article will show us how to turn numbers into the String with padded space or numbers.

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Flattening Stream Collections in Java

Posted on March 1, 2022 by Andrej Buday

This article is about Java 8 stream feature flatMap. If we have a List<List<Object>>, how can we turn the list of lists into a single list that contains all the elements from the lists in the same streamflow using the features of Java 8?

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What does the double star operator mean in Python?

Posted on February 1, 2022 by Andrej Buday

In some Python code, you might spot double stars standing next to each other. What do those two stars mean, and what is their job? We will answer all the questions in this article.

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Selenium – remove html element from the DOM

Posted on January 3, 2022 by Andrej Buday

This article will show you how to remove elements from HTML DOM (Document Object Model) when using automated web-browser framework Selenium. If you want to remove anything you do not want on your site during web-scraping, you came to the right Selenium tutorial.

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How to join List String elements with a comma

Posted on January 1, 2022 by Andrej Buday

This article will show three different ways to print string elements of the list into one coherent text.

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