執行jar文件時出錯

當我嘗試從cmd打開.JAR文件時，爲什麼會出現此錯誤？執行jar文件時出錯

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 
    at javax.swing.ImageIcon.<init>(Unknown Source) 
    at sqlprojectgestor.Gestor.initComponents(Gestor.java:311) 
    at sqlprojectgestor.Gestor.<init>(Gestor.java:28) 
    at sqlprojectgestor.Gestor.lambda$main$0(Gestor.java:1017) 
    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$3.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) 
    at java.awt.EventQueue.dispatchEvent(Unknown Source) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
    at java.awt.EventDispatchThread.run(Unknown Source)

我嘗試運行與雙擊.jar文件，但它不會打開...

來源

2016-04-10 A. Zambrano

它看起來像是在你的代碼中發生錯誤。爲了調試它，我們需要看代碼。你可以在沒有問題的情況下從IDE運行代碼嗎？ – nhouser9

我認爲錯誤在你的圖像路徑中。嘗試使用相對路徑。 –

如果我從netbeans運行我的程序，運行時沒有錯誤，這就是爲什麼我覺得它很奇怪：/ @ nhouser9 –

我懷疑你的問題是由不包括在你的JAR圖像造成的。請看這個問題：如何做到這一點：這可能是因爲你沒有在JAR中包含圖像作爲資源。看到這個問題：Add image to JAR Java

來源

2016-04-10 14:15:42 nhouser9

執行jar文件時出錯

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