Não consigo usar imagens no JFrame

Segui passo a passo o que dizia no curso do java, tudo funciona perfeitamente, exceto os Icons
Tentei criar um pacote de imagens paralelo a classe principal e dentro do pacote principal e sempre diz BUILD SUCCESS porem nunca mostra a janela
Segue o Output:
Scanning for projects…

————————< pacote:mavenproject1 >————————
Building mavenproject1 1.0-SNAPSHOT
——————————–[ jar ]———————————

— exec-maven-plugin:3.0.0:exec (default-cli) @ mavenproject1 —
Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:217)
at pacote.teste.initComponents(teste.java:33)
at pacote.teste.<init>(teste.java:17)
at pacote.teste$1.run(teste.java:86)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
————————————————————————
BUILD SUCCESS
————————————————————————
Total time: 2.160 s
Finished at: 2022-05-17T11:05:07-03:00
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