You’ve visited a building where you need an access card. Without the card, you don’t get in. But the card doesn’t (or shouldn’t) open all doors once you are in the building. Some areas must be off-limits. That’s physical access control. Digital access control works on the same principle. It
We often need to compare objects. Sorting, for example, is based on comparison according to some criteria. So it is important to understand the difference between Comparable and Comparator.
You’ve heard the term “canonical class”, but what does it mean? In Java, a canonical class is simply a well-formed or well-behaved class. The canonical class form is most often used for model classes (also called domain or entity classes).
HyperText Transfer Protocol (HTTP) is the network protocol that allows your browser to communicate with a web server. HTTP makes it possible to send and receive information across the internet. HTTPS is the secure version of HTTP. For a long time, you only needed HTTPS if you used sensitive data
We know that Covid-19 has had a disastrous effect on the economy every where. For individuals and companies, it has meant a loss of income and an increase in financial debt. That got me to thinking about a different kind of debt. Technical debt.
As a user, you need to manage your passwords. (If you are struggling with that, read our blog post about password managers.) As a developer, you have a much greater responsibility. You are the Guardian at the Gate: it’s your job to keep your users’ passwords safe from potential attackers.
You’ve heard of JavaBeans. But what are they actually? Java 1.1. introduced the term JavaBean to describe a self-contained, reusable, high-granularity component. The original idea was to create high-level building blocks for graphical user interfaces (GUI).
You often use the Java concatenation operator (+) to concatenate (join) two strings together. And you use it with both string literals and string variables. But what’s going on behind the scenes?
I haven’t won the lottery for ages. And it’s been a while since an unknown relative died and left me a fortune. But I still get phishing emails quite often, and they are getting more sophisticated.
I don’t know about you, but there are days when I crave a change of scenery. Pre-pandemic, my life was pretty routine. Work, exercise, an occasional outing with friends. I think anyone with a full-time job and responsibilities at home – from laundry to looking after family – has a
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