将图像添加到JFrame时，出现以下错误，并且它不运行，一旦将图像删除，它就可以正常工作。
--- maven-resources-plugin:2.6:resources (default-resources) @ HCIProject ---
Using 'UTF-8' encoding to copy filtered resources.
skip non existing resourceDirectory C:\Users\HP\Documents\NetBeansProjects\HCIProject\src\main\resources
--- maven-compiler-plugin:3.1:compile (default-compile) @ HCIProject ---
Nothing to compile - all classes are up to date
--- exec-maven-plugin:1.5.0:exec (default-cli) @ HCIProject ---
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at java.desktop/javax.swing.ImageIcon.<init>(ImageIcon.java:217)
at com.mycompany.hciproject.EditContents.initComponents(EditContents.java:213)
at com.mycompany.hciproject.EditContents.<init>(EditContents.java:18)
at com.mycompany.hciproject.EditContents$30.run(EditContents.java:715)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:316)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)```