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Answer 1

+2 A:

Have a look at the classes in the package java.util.jar. You can find examples of how to list the files inside the JAR on the web, here's an example. (Also note the links at the bottom of that page, there are many more examples that show you how to work with JAR files).

Jesper 2010-08-07 05:50:38

Thank you very much, and ".class" files is the classes? how can I load .class files as the classes?

Hossein Margani 2010-08-07 06:04:00

So you want to load classes dynamically from a JAR file? That's much more than what you originally asked for. Maybe this question contains some answers: http://stackoverflow.com/questions/194698/how-to-load-a-jar-file-at-runtime

Jesper 2010-08-07 06:10:07

ok, thanks I solved it!.

Hossein Margani 2010-08-07 06:34:21

Answer 2

+1 A:

Here is code for listing classes in jar:

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

public class JarList {
    public static void main(String args[]) throws IOException {

        if (args.length > 0) {
            JarFile jarFile = new JarFile(args[0]);
            Enumeration allEntries = jarFile.entries();
            while (allEntries.hasMoreElements()) {
                JarEntry entry = (JarEntry) allEntries.nextElement();
                String name = entry.getName();
                System.out.println(name);
            }
        }
    }
}

YoK 2010-08-07 06:14:31

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Listing classes in a jar file

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