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via Coderanch by Lu Kim Hui, 1 year ago
java.lang.NullPointerException: 	at SalesCounter.readFromFile(SalesCounter.java:35)	at SalesCounterDemo.main(SalesCounterDemo.java:6)	at __SHELL1.run(__SHELL1.java:6)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:601)	at bluej.runtime.ExecServer$3.run(ExecServer.java:724)