Problema file .jar principale di progetto

[roquentin]

ciao andbin, allora:

Chiarisci il "aprirlo" .... doppio-click sul jar?

Esatto, doppioclick.

Hai provato da console? java -jar nome.jar
Almeno così vedi più chiaramente se ci sono eccezioni

Ho provato dal prompt, spostandomi all'interno della sottodirectory "dist" e facendo java -jar nome.jar ed ecco il risultato:

SEVERE: null
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at pve.PVE.initComponents(PVE.java:451)
at pve.PVE.<init>(PVE.java:68)
at pve.PVE$21.run(PVE.java:1849)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPri vilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(U nknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

che significa ?