Catch-22: a dilemma or difficult circumstance from which there is no escape because of mutually conflicting or dependent conditions. An update on some statistics Since our first virtual course in March 2020, I’ve included this question in the online course evaluation form: "Do you prefer virtual or classroom training?" I
We look at the JVM (Java Virtual Machine) command line options that customise how the interpreter and the JIT compiler operate at runtime.
Learner engagement is important if we want people to actually learn. But should we take the romantic approach, or the tough love approach. I take the less popular view.
The role of the JVM interpreter is to compile Java code to intermediate bytecode, which is then executed by an interpreter. We can also use a JIT compiler. A quick review of the compiler, interpreter and the JVM.
Hacktivism: the use of hacking to promote social causes. Between Eskom, inflation and the price of fuel, we’re all taking strain. After a family funeral this morning, I couldn’t think of anything I wanted to write about. I wanted something upbeat or funny, but nothing came to mind. If you
Java strings are internally represented in either ASCII or UTF-16. So a Java programmer should know something about ASCII, Unicode and UTF. We look at ASCII, Unicode, UTF-8, UTF-16 and UTF-32
Imprudence: lack of wisdom or care in the management of practical affairs; lack of discretion. It’s business as usual for ransomware and email scammers. And some of them get better by the day. I had a very narrow escape this week, that could have cost me a lot of money.
Compact strings in Java are an enhancement introduced in Java 9. Strings use a lot of heap memory. Reducing the internal size of a string can save memory and garbage collection overhead. Let’s have a look at how compact strings work in Java.
If you fail to connect, it might not be a technical problem. Everybody needs to communicate. Everybody needs to write. The onus is on you to write in a way that communicates clearly – otherwise you have failed to connect.
Choosing a collection in Java is important. You want to know how to choose the right concrete collection class to use for your Java collection. In this article we look at choosing the interface, choosing the implementation, and comparing the various concrete classes in the Collections framework.
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