Docker and Kubernetes
Lewis Coosner
2022-11-01
No Comments
We hear a lot of talk about Docker and Kubernetes. Lewis explains how they fit into the world of containerisation.
Lewis Coosner
An electrical engineer by profession, Lewis has been involved in software development since the 1980s.
He has programmed in C, C++, Fortran, Assembler, Pascal, Java and Visual Basic, and has extensive experience in the development of systems in the military and engineering environment.
Lewis is primarily responsible for developing and presenting the Java and OO-related courses, and was one of the first two Java lecturers in the country to be certified by Sun Microsystems.
In his free time, Lewis cycles, kayaks, hikes, caves, climbs and generally exhausts himself.
More posts by Lewis Coosner
Containers
Lewis Coosner
2022-10-25
1 Comment
A container is an executable software unit containing an application that has been packaged with the libraries and other dependencies it needs to run. Docker and Kubernetes are two technologies that are often referred to when we talk about containers.
Virtual Machines and Hypervisors
Lewis Coosner
2022-10-18
No Comments
Cloud computing relies on virtualization. Virtualization relies on hypervisors. Lewis looks at how virtualization and hypervisors work. He also explains the difference between virtualization and containerization.
Introduction to Cloud Computing
Lewis Coosner
2022-10-10
No Comments
For the last few posts we’ve been looking at some interesting aspects of floating point mathematics. There’s a lot more where that came from (which
NaN – Not a Number
Lewis Coosner
2022-10-04
No Comments
Lewis takes a look at the interesting and peculiar NaN – Not a Number.
Observation, Knowledge and the Decimal Point
Lewis Coosner
2022-09-26
1 Comment
Knowledge and observation are important for any programmer. You need to have Java knowledge – know the rules of the language. You need to observe – see what you are looking at when you code and debug.
RTFS – Read the Fabulous Screen
Lewis Coosner
2022-09-19
No Comments
RTFS – Read the Fabulous Screen. Lewis takes a look at the importance of reading Java error messages, and how they will help you find your problem.
RTFM – Read the Fabulous Manual
Lewis Coosner
2022-09-12
2 Comments
RTFM – Read the Fabulous Java Manual! Lewis revisits this age-old answer. It is not a good enough answer to give junior programmers, but it should also be a mantra for all Java programmers to keep learning.
Local Type Variable Inference in Java
Lewis Coosner
2022-09-05
No Comments
I talked about local variable type inference before. But this is worth a repeat, because local variable type inference reduces the verbosity of Java. And Java 11 adds local variable syntax for lambda parameters.
Switch Expressions in Java
Lewis Coosner
2022-08-30
No Comments
You already know the switch statement in Java. But did you know that you can use switch expressions in Java to simplify your code?