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via Stack Overflow by Anonymous
, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at array.binarytree.insert(binarytree.java:37)	at array.binarytree.insert(binarytree.java:47)	at array.binarytree.insert(binarytree.java:47)	at array.binarytree.main(binarytree.java:21)