default hashCode() behaviour ?

[Ajay Divakaran]

Does the default hashCode() return unique number for each new object created?

[marc weber]

According to the API documentation for Object's hashCode() method...

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java[TM] programming language.)

[Jesper de Jong]

Note that it is not guaranteed that Object.hashCode() returns a unique number for every object. Two different objects can have the same hash code.