java.lang.NullPointerException

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  • a hopefully simple problem
    via by 807549,
    • java.lang.NullPointerException at Calculator$Func.<init>(Calculator.java:117) at Calculator.<init>(Calculator.java:10) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:274) at java.lang.Class.newInstance0(Class.java:306) at java.lang.Class.newInstance(Class.java:259) at sun.applet.AppletPanel.createApplet(AppletPanel.java:566) at sun.applet.AppletPanel.runLoader(AppletPanel.java:495) at sun.applet.AppletPanel.run(AppletPanel.java:292) at java.lang.Thread.run(Thread.java:536)
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