Programming
Build a Peephole Optimiser using the Java 24 Class-File API
When you think about code optimisation, you might imagine complex analysis over entire programs, sophisticated JIT compilers, or elaborate data-flow analyses. But some of the most effective optimisations come from a much simpler technique: peephole optimisation. This approach can yield surprisingly good results with relatively little complexity.
LLVM Hello World
Writing a “Hello World” program is often a rite of passage for a software engineer when learning a new language.
Java Class-File API Hello World Translator
Often, when you start to learn a new language you'll write a "Hello World" application as a first step. In this post, as a first step to transforming Java class files, we'll write a "Hello World" translator.
We'll see how, in just a few lines of code using the Java Class-File API, we can create an application that can apply a code transformation to automatically translate "Hello World" to some other language such as "Hallo Wereld".
Build A Compiler With The Java Class-File API
As a Java developer you probably spend a lot of time writing Java source code and executing a Java compiler to convert that human readable Java source into machine readable bytecode stored in Java class files.
If you've ever wondered how a compiler works or how a Java compiler creates Java class files, then keep reading! We'll work through writing a compiler for a simple programming language that compiles to Java bytecode.
We'll implement a compiler for the esoteric programming language Brainf*ck, which is simple enough that it doesn’t require much code to create a working compiler.
Java Class-File API Hello World
Writing a “Hello World” program is often a rite of passage for a software engineer when learning a new language.
If you’re a Java developer, you might even remember the first time you typed public static void main(String[] args) in your editor of choice. But did you ever wonder what’s inside that “.class” file that the compiler spits out? Let’s look at how we can write a JVM “Hello World” by creating a class file programmatically.
We’ll work through creating a class file for the following simple Java Hello World application.
JVM Hello World
Writing a “Hello World” program is often a rite of passage for a software engineer when learning a new language.
If you’re a Java developer, you might even remember the first time you typed public static void main(String[] args) in your editor of choice. But did you ever wonder what’s inside that “.class” file that the compiler spits out? Let’s look at how we can write a JVM “Hello World” by creating a class file programmatically.
We’ll work through creating a class file for the following simple Java Hello World application.
How To Build A Log4Shell Detector
Klox: A Kotlin implementation of lox with a JVM backend built using ProGuardCORE
A Kotlin implementation of lox, the language from Crafting Interpreters, with a JVM backend built with ProGuardCORE.
The klox language is a superset of lox and includes features not implemented in the Crafting Interpreters lox implementation.
Brainf*ck Interpreter
As an exercise in using Scala's parser combinator library I implemented a Brainfuck interpreter - see my Github.
Advent of Code 2017
I used Advent of Code 2017 to try out a few different languages: Java, Lisp, Scala or Python.
Simple PHP Shopping Cart Tutorial
This is a very simple shopping cart that I wrote at university because many of my peers were asking for help with similar problems for assignments. It is incomplete and is not intended for use on a production website!
