Performing DynamicInvoke From Java - A Step By Step Journey. This post shows a simple pattern to make Java a fully dynamic language using dynamic class creation and invokedynamic.
It is a step by step exploration of the subject written as I was developing the idea: Java 7 sees the invokedynamic game changing opt code. It allows optimized invokation of dynamically defined methods by patching little combinatorial trees directly into the JVM bytecode structure. But - YOU CANNOT GET TO IT FROM JAVA. I was not standing for that - so here is my story of working around this limitation and by so doing creating a pattern for fully dynamic Java. Java Virtual Machine Support for Non-Java Languages. The following topics are covered: Introduction The Java SE platform enables the development of applications with the following features: Can be written once and run anywhere Can be run securely because of the Java sandbox security model Easy to package and deliver The Java SE platform also provides robust support with respect to the following areas (and more): Concurrency Garbage collection Reflective access to classes and objects JVM Tool Interface (JVM TI): A native programming interface for use by tools.
JVM/Java: Comparing InvokeDynamic Performance To Invokestatic. The reason for invokedynamic is that it is fast.
Reflect is very much slower indeed. But is it anything near as fast as invokestatic? This will tell us: This code can answer the question. It uses the on-the-fly technique I used in my previous post compare invoking the method below both via invokestatic and invokedynamic: