• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Bear Bibeault
  • Liutauras Vilda
Sheriffs:
  • Jeanne Boyarsky
  • Tim Cooke
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Jj Roberts
  • Carey Brown
Bartenders:
  • salvin francis
  • Frits Walraven
  • Piet Souris

jar file information

 
Greenhorn
Posts: 10
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi, I have use of jar file information, like class name and their methods name. I am using following code to list all files contains a particular jar file: -

import java.io.IOException;
import java.util.Enumeration;
import java.util.jar.JarFile;

public class JarFileInfo {

public static void main(String args[]) throws IOException {
JarFile j = new JarFile("jar file path");
Enumeration e = j.entries();

while (e.hasMoreElements()) {
System.out.println(e.nextElement());

}
}
}

Now, How would I get only class names and their respective method names? if I get only class name I can list their methods using following: -
Method[] methods = classnameobj.getDeclaredMethods();
System.out.println("Methods name are as below: -");
int i = 0;
for(Method method : methods) {
System.out.println(method.getName());
methName[i] = method.getName();
i++;

}
so, my problem is only getting all Class names of any particular jar file, any guidance or suggestions plzzzz.
 
Rancher
Posts: 43016
76
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Using the JarFile.getInputStream(JarEntry) method you can get at the bytes that make up the class file. Then you can use ClassLoader.defineClass to create a Class object, which you can use to get at the methods.
 
That feels good. Thanks. Here's a tiny ad:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
https://coderanch.com/wiki/718759/books/Building-World-Backyard-Paul-Wheaton
reply
    Bookmark Topic Watch Topic
  • New Topic