How often do you imply facts that nowhere have been stated or confirmed? Last week I found myself trapped by such a certainty that revealed to be a false assumption.

Ever asked yourself what you can expect from the values delievered by the JDK's method System.identityHashCode(Object object) ? My original believe (and I suppose I am not alone here) was that the value reflects somehow the memory address of the given object. Not that I tried to access the object in any obscure way, it was just based on the fact that there are not a lot of more things to assign an identity to an object - implying that identity has something to do with uniqueness for the object's lifetime.