Getting ready for a Java interview in 2025? It can feel like a lot, especially with so many different things to know. Whether you’re just starting out or you’ve been coding for a while, this guide is ...

Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. Vivek Yadav, an engineering manager from ...

The method selectionArgs() in SelectionData returns a direct reference to the internal mutable array selectionArgs. Returning the original array exposes the internal state of the object and violates ...

Mutability and immutability are properties of certain classes of object. For example, these are immutable—once created they cannot be changed: numeric types (int and float) Booleans strings tuples ...

In this case, there’s an argument, a simple calculation, and the result is returned. This is pure, in that there’s nothing changed outside the function and there’s no observable behavior of the ...

A monthly overview of things you need to know as an architect or aspiring architect. Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with ...

Java's default constructor allows developers to create instances of classes when no other constructors are explicitly defined. The default constructor in Java takes no arguments -- it simply ...

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want. Copying objects ...

Converting Excel or CSV files into Java objects (POJOs) and vice versa can be a complex process, but with the right tools and techniques, it becomes much more manageable. In this guide, we’ll explore ...