The Garbage Collector in Java
Lewis Coosner
2022-08-04
We look at the role of the garbage collector in Java. There are multiple garbage collectors, and it’s important to choose the right one for better performance.
Programming
The Ahead of Time (AOT) Compiler
Lewis Coosner
2022-08-02
The Ahead of Time (AOT) compiler compiles Java classes to native code before running the Java application. It is a way to improve performance. AOT was introduced and then removed from OpenJDK, but is still available.
JVM and JIT Command Line Options
Lewis Coosner
2022-07-26
We look at the JVM (Java Virtual Machine) command line options that customise how the interpreter and the JIT compiler operate at runtime.
JVM Interpreter versus Just-In-Time Compiler
Lewis Coosner
2022-07-19
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.
Unicode and UTF – A Quick Overview
Lewis Coosner
2022-07-11
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
Compact Strings in Java
Lewis Coosner
2022-07-05
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.
Choosing a Collection in Java
Lewis Coosner
2022-06-29
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.
Big O Notation
Lewis Coosner
2022-06-22
Big O notation is a tool we use to analyse the cost of an algorithm. It is a useful concept when we want to choose which collection class to use for a particular use case
Cross-Platform Mobile App Development for Java Developers
Lewis Coosner
2022-06-13
In this article I look at the options for Java developers when it comes to cross-platform mobile app development. The options are varied, but not great if you stick with Java.
How to package your Java application
Lewis Coosner
2022-06-08
The standard way of packaging a Java application is to create a JAR or WAR file that contains the components we need. I take a quick look at the types of JAR and WAR files. We need to choose correctly if we want to use microservices.