Are you just using ArrayList whenever you need to group data?What are the specific scenarios where Set or Map are the correct ...

A runnable, interview-focused reference for the Java Collections Framework (Java 17+). Each major collection has its own Java file. Examples demonstrate commonly used methods, and comments explain the ...

You have started studying Java and are writing code while following reference books or videos.If you type exactly as explained, the program runs and no errors occur.However, when you try to 'build ...

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There's no one-size-fits-all solution to transition code from Java 8 to Java 11. For a non-trivial application, moving from Java 8 to Java 11 can be a significant amount of work. Potential issues ...

Azure Event Grid allows you to easily build applications with event-based architectures. The Event Grid service fully manages all routing of events from any source, to any destination, for any ...

Learn how to use advanced techniques like short-circuiting, parallel execution, virtual threads, and stream gatherers to maximize Java stream performance. My recent Java Stream API tutorial introduced ...

Package a Jakarta EE 11 web application and Open Liberty runtime into one runnable JAR with Maven and the Liberty Maven Plugin. Use JUnit, Cucumber, REST Assured, Selenium and JMeter to test Java ...

The Java Runtime Environment (JRE) is a software package that Java programs require in order to run successfully. The JRE consists of the Java Virtual Machine (JVM), which executes Java bytecode using ...

Generics make your code more flexible and easier to read, and they help you avoid ClassCastExceptions at runtime. Get started with this introduction to using generics with the Java Collections ...

The ideal Java Excel API library for Java applications has all the features you need to perform Excel operations as if you’re using the real thing. They are designed to allow developers to accomplish ...