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via Stack Overflow by Koudela
, 1 year ago
java.lang.NullPointerException: 	at testingJava.SubClass.set(SubClass.java:19)	at testingJava.SuperClass.(SuperClass.java:7)	at testingJava.SubClass.(SubClass.java:10)	at testingJava.MainClass.main(MainClass.java:9)