Eu gostaria de fazer o "clic duplo" do aplicativo cli mas ainda não entendi como. Eu sei que deveria, de alguma forma, editar o manifesto, mas isso é tudo. Eu googled ofc. mas sem sucesso. Obrigado por qualquer dica. Aqui está a saída da construção, execução e manifesto:

compile:
Created dir: /home/nick/NetBeansProjects/SemestralWork/dist
Building jar: /home/nick/NetBeansProjects/SemestralWork/dist/SemestralWork.jar
Not copying the libraries.
To run this application from the command line without Ant, try:
java -jar "/home/nick/NetBeansProjects/SemestralWork/dist/SemestralWork.jar"
jar:
BUILD SUCCESSFUL (total time: 1 second)


java -jar /home/nick/NetBeansProjects/SemestralWork/dist/SemestralWork.jar

Exception in thread "main" java.lang.NoClassDefFoundError: semestralwork/Main
Caused by: java.lang.ClassNotFoundException: semestralwork.Main
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
Could not find the main class: semestralwork.Main. Program will exit.

MY MANIFEST created with build:

Manifest-Version: 1.0

Ant-Version: Apache Ant 1.7.1

Created-By: 14.0-b08 (Sun Microsystems Inc.)

Main-Class: semestralwork.Main

Class-Path: 

X-COMMENT: Main-Class will be added automatically by build