Author Archives: Andrej Buday

7 different ways how to get NumberFormatException in Java

This article will show you the NumberFormatException, how you are getting it and what you should do to handle the exception properly. Continue reading

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

This article is about multiple ways to pull a character from a string and check if it is a number. Continue reading

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Developer Notes 001

The list of a few developer notes collected during the software development which were not enough for a self-standing article. Continue reading

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How To Turn Number To String With Padded Space or Zeroes

Article about a simple solution to turning numbers into specific length String with padded space. Continue reading

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Flattening Stream Collections in Java

This article is about flattening the list of element list with use of Java 8 stream feature flatMap and forEach Continue reading

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What does the double star operator mean in Python?

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. Continue reading

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Selenium – remove html element from the DOM

This article will show you how to remove elements from HTML DOM (Document Object Model) when using automated web-browser framework Selenium. Continue reading

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How to join List String elements with a comma

In this article, we will see three different ways to print string elements of the list into one coherent text. Continue reading

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How to convert private key DER to PEM file type

In this article I will show you quick work around how to turn .pem file type into the .der file type on Windows. Continue reading

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Create PostgreSQL database for integration testing with Docker

In this article, we will explore the idea of creating a PostgreSQL database Dockerfile. We can, for example, use it for creating integration tests in a separate CI/CD workflow. Continue reading

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