<html> <body> The Javassist Core API. <p>Javassist (<i>Java</i> programming <i>assist</i>ant) makes bytecode engineering simple. It is a class library for editing bytecode in Java; it enables Java programs to define a new class at runtime and to modify a given class file when the JVM loads it. <p>The most significant class of this package is <code>CtClass</code>. See the description of this class first. <p>To know the version number of this package, type the following command: <ul><pre> java -jar javassist.jar </pre></ul> <p>It prints the version number on the console. </body> </html>