Java Lambda Expressions Examples

Lambda expressions in Java are a concise way to represent anonymous functions or “function literals.” They are primarily used to implement functional interfaces, which are interfaces with a single abstract method. Let’s dive into some examples.

Read more

How to configure the HeapDumpOnOutOfMemoryError parameter in Java

This article will teach you what is the usage of the HeapDumpOnOutOfMemoryError JVM parameter and how to configure it on an application server such as JBoss EAP or WildFly. HeapDumpOnOutOfMemoryError made simple The JVM parameter “-XX:+HeapDumpOnOutOfMemoryError” captures OutOfMemoryError instances that occur due to memory exhaustion in the Java heap space. When the Java Virtual Machine … Read more

How to Fix the HTTP 415 “Unsupported Media Type” Error with JSON

If you’re a developer who has worked with web APIs, you might have come across the HTTP 415 “Unsupported Media Type” error. This error occurs when the server doesn’t support the media type that’s being used in the request. In this tutorial, we’ll discuss one common cause of the HTTP 415 error and how to fix it.

Read more

How to catch multiple Exceptions in Java

When working with Java, it’s common to encounter situations where you need to handle multiple exceptions. Fortunately, Java provides a simple and efficient way to do this using the catch block. In this tutorial, we’ll explore how to catch multiple exceptions in Java, along with some tips and code snippets to help you get started.

Read more

Java Finally Block – When it is not executed ?

The finally block in Java is used to define a section of code that will always be executed, regardless of whether an exception is thrown or caught. However, there are certain conditions under which the finally block may not execute. In this tutorial, we’ll explore these conditions and provide some code snippets to illustrate them. Hint: read it through as this is a common interview question!

Read more

How to solve

If you’re encountering the “handshake_failure through SSLHandshakeException” error, it means there is an issue with the SSL/TLS handshake between the client and server. This can be caused by a variety of reasons such as outdated SSL/TLS protocol version, missing SSL/TLS certificates, or incorrect SSL/TLS configurations.

Read more

JBang: Create Java scripts like a pro

JBang is a scripting tool which allows to run Java application with minimal set up, without the need of having a project configuration. In this tutorial we will learn how to use it to run a simple Java application and then we will be looking at a more complex example, which starts a Quarkus application.

Read more

Two ways to read a File in a String with Java

Do you need to read a File into a String in Java ? This article will show two simple ways to achieve it. By the end of it, you will also learn the differences between each solution. Solution #1 Use Files.readAllBytes The first solution, which reads a file into an array of Bytes, uses the … Read more

How to initialize an Array in Java in 4 simple ways

This article discusses about array initialization in Java, showing multiple ways to initialize an array, some of them you probably don’t know! How to declare an array in Java Firstly, some background. Java classifies types as primitive types, user-defined types, and array types. An array type is a region of memory that stores values in … Read more