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Calculate Number of Weekdays Between Two Dates in Java
1. Overview In this tutorial, we’ll look at two different methods in Java for calculating the number of weekdays between two dates. We’ll look at a readable version using Streams and a less readable...
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Rotate a Vertex Around a Certain Point in Java
1. Overview When working with computer graphics and game development, the ability to rotate vertices around a certain point is a fundamental skill. In this quick tutorial, we’ll explore different...
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List vs. Set in @OneToMany JPA
1. Overview Spring JPA and Hibernate provide a powerful tool for seamless database communication. However, as clients delegate more control to the frameworks, including query generation, the result...
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How to Determine if a String Contains Invalid Encoded Characters
1. Introduction Invalidly еncodеd charactеrs can lеad to various issues, including data corruption and sеcurity vulnеrabilitiеs. Hence, ensuring that the data is properly еncodеd when working with...
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Difference between ZoneOffset.UTC and ZoneId.of(“UTC”)
1. Introduction Date and time information must be processed accurately in Java, and this involves managing time zones. ZoneOffset.UTC and ZoneId.of(“UTC”) are two standard methods that we can use for...
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Calculating the Power of Any Number in Java Without Using Math pow() Method
1. Introduction Calculating the powеr of a numbеr is a fundamental opеration in mathеmatics. And, while Java provides the convenient Math.pow() mеthod, there may be instances where we prеfеr...
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Improving Test Coverage and Readability With Spock’s Data Pipes and Tables
1. Introduction Spock is a great framework for writing tests, especially regarding increasing test coverage. In this tutorial, we’ll explore Spock’s data pipes and how to improve our line and branch...
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Event Externalization with Spring Modulith
1. Overview In this article, we’ll discuss the need to publish messages within a @Transactional block and the associated performance challenges, such as prolonged database connection times. To tackle...
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How to Find the URL of a Service in Kubernetes
1. Overview Networking is an integral part of Kubernetes, with Service being one of its primitive networking objects. Kubernetes Service allows us to expose a network application to the external world....
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Introduction to gRPC with Spring Boot
1. Overview gRPC is a high-performance, open-source RPC framework initially developed by Google. It helps to eliminate boilerplate code and connect polyglot services in and across data centers. The API...
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Java Weekly, Issue 526
1. Spring and Java >> How to use the Java CountDownLatch [vladmihalcea.com] How to use the Java CountDownLatch to write test cases that take concurrency into consideration. A good read as always....
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Monkey Patching in Java
1. Introduction In software development, we often need to adapt and enhance our systems’ existing functionalities. Sometimes, modifying the existing codebase may not be possible or may not be the most...
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Set an Environment Variable at Runtime in Java
1. Overview Java provides a simple way of interacting with environment variables. We can access them but cannot change them easily. However, in some cases, we need more control over the environment...
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Convert Gregorian to Hijri Date in Java
1. Overview The Gregorian and Hijri calendars represent two distinct systems for measuring time. In this tutorial, we’ll look at various approaches to converting a Gregorian Date to a Hijri Date. 2....
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Creating Unicode Character From Its Code Point Hex String
1. Overview Java’s support for Unicode makes it straightforward to work with characters from diverse languages and scripts In this tutorial, we’ll explore and learn how to obtain Unicode characters...
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N+1 Problem in Hibernate and Spring Data JPA
1. Overview Spring JPA and Hibernate provide a powerful tool for seamless database communication. However, because clients delegate more control to the frameworks, the resulting generated queries might...
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Regular Expression for Password Validation in Java
1. Introduction Regarding cybersecurity, password validation is essential in protecting users’ accounts. Moreover, using regular expressions (regex) in Java provides a powerful and dynamic way of...
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Convert Long to Date in Java
1. Overview When working with dates in Java, we often see date/time values expressed as long values that denote the number of days, seconds, or milliseconds since the epoch, January 1, 1970, 00:00:00...
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Getting Started With TimescaleDB
1. Overview In this article, we’ll explore TimescaleDB, an open-source time-series database built on top of PostgreSQL. We’ll delve into its features, examine its capabilities, and discuss how to...
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Print a Java 2D Array
1. Overview In this tutorial, we’ll get familiar with some ways to print 2D arrays, along with their time and space complexity. 2. Common Ways to Print a 2D Array Java, a versatile programming...
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