Jakarta EE and Spring Boot are the two de facto frameworks when developing enterprise Java applications. They are both very powerful frameworks. However, they have different design philosophies and cater to different development needs.
The Jakarta EE 12 release cycle is currently one of the more interesting developments in the Java ecosystem.
March 2026 update on the state of the Java ecosystem. It is faster and leaner than 3 years ago.
Lewis explains ThreadLocal Variables in Java.
Escaping object references can become an issue with concurrent running threads.
How do we choose a float data type over a double to represent a value? And once we’ve chosen one over the other, how will it affect the speed of our application? Is a float faster than a double, or vice versa?
Lewis explains why you should never compare floating point numbers for equality.
A quick overview of the primitive floating point types in Java, and how to print the mantissa and exponent.
Lewis looks at how floating point numbers are represented in computer memory, and introduces the problem of quantitization error.
Lewis explains how integral numbers are represented in computer memory. Java has four primitive integral data types.
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