Question

I’m looking for a way to extract data from a jar file.
What i need is information about a certain class file including:
– Constructor name
– Public methods (getters, setters and actions.)
– Perhaps if included the javadoc

For example, in Eclipse, when you type your variable and you press ‘.’ behind it, it gives a complete list of methods, so i’m guessing there should be a way to find this data out. (I’d only need the names of the methods, not the actual code.)

Some actual code, pseudocode, instructions or anything else is appreciated.

Answer 1

Extract the jar as a simple zip with ZipFile, as shown in this page:
http://www.java-examples.com/extract-zip-file-subdirectories-using-command-line-argument-example

Then, for each .class file found, use the ClassParser: http://commons.apache.org/bcel/apidocs/org/apache/bcel/classfile/ClassParser.html

A quicker way:

Also with ClassParser’s constructor ClassParser(String zipFile, String fileName) you can get every information you want about the fileName class in your zipFile