Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

Properties and methods make Java classes interesting. Properties represent the data an object possesses, while methods enable the intelligent manipulation of that data. However, to perform any ...

Ever come across the null pointer exception in Java? We explain what this error message means, why it happens, and how to avoid the billion-dollar mistake.

When classes are more structure than you need, tuples let you specify simple type-safe aggregates of other data types. They'll also let you create a dictionary collection…but it won't be type-safe.

I got an email from a customer who wanted to use BLOB data type in their CMP entity bean. In this blog, I will provide an example and will discuss how can you develop your CMP EJBs to use a BLOB ...

We dig into the different options available to store data locally on an android device, complete with sample source code.