-do-compile:
    [mkdir] Created dir: /home/thufir/NetBeansProjects/gnumail-providers/build/empty
    [mkdir] Created dir: /home/thufir/NetBeansProjects/gnumail-providers/build/generated-sources/ap-source-output
    [javac] Compiling 3 source files to /home/thufir/NetBeansProjects/gnumail-providers/build/classes
    [javac] warning: [path] bad path element "/home/thufir/NetBeansProjects/gnumail-providers/${libs.gnu_mail_all.classpath}": no such file or directory
    [javac] /home/thufir/NetBeansProjects/gnumail-providers/src/net/bounceme/dur/nntp/gnu/Main.java:39: error: Alternatives in a multi-catch statement cannot be related by subclassing
    [javac]         } catch (NoSuchProviderException | MessagingException ex) {
    [javac]                                            ^
    [javac]   Alternative NoSuchProviderException is a subclass of alternative MessagingException
    [javac] 1 error
    [javac] 1 warning

BUILD FAILED
/home/thufir/NetBeansProjects/gnumail-providers/nbproject/build-impl.xml:601: The following error occurred while executing this line:
/home/thufir/NetBeansProjects/gnumail-providers/nbproject/build-impl.xml:243: Compile failed; see the compiler error output for details.

Total time: 2 seconds
thufir@dur:~/NetBeansProjects/gnumail-providers$
thufir@dur:~/NetBeansProjects/gnumail-providers$ cat src/
META-INF/          net/               usenet.properties
thufir@dur:~/NetBeansProjects/gnumail-providers$ cat src/net/bounceme/dur/nntp/gnu/
Article.java           Main.java              PropertiesReader.java
thufir@dur:~/NetBeansProjects/gnumail-providers$ cat src/net/bounceme/dur/nntp/gnu/Main.java
package net.bounceme.dur.nntp.gnu;

import java.io.IOException;
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.URLName;
import static java.lang.System.out;

public class Main {

    Main() {
        gmane();
    }

    public static void main(String[] args) {
        new Main();
    }

    private void gmane() {
        try {
            Properties props = new Properties();
            Session session = Session.getDefaultInstance(props);
            session.setDebug(true);
            Store store = null;
            store = session.getStore(new URLName("localhost"));
            Folder root = null;;
            root = store.getDefaultFolder();
            Folder folder = null;
            folder = root.getFolder("gmane.comp.gnu.gnucomm.general");
            folder.open(Folder.READ_ONLY);
            System.err.println("Folder " + folder.getName() + " has " + folder.getMessageCount() + " messages");
            folder.close(false);
//        } catch (NoSuchProviderException | MessagingException ex) {

        } catch (NoSuchProviderException | MessagingException ex) {
            out.println(ex);
        }
    }
}
thufir@dur:~/NetBeansProjects/gnumail-providers$
thufir@dur:~/NetBeansProjects/gnumail-providers$