Default Hash Code Behavior in Java
If the hashCode() method is not overridden, invoking it on an object in Java yields a system-generated hash code.
Underlying Mechanism
In HotSpot JVM, the hashCode is typically determined by one of the following methods:
Controllable Behavior
The behavior of the hash code generation can be modified using the -XX:hashCode=n HotSpot JVM option. The following values are available:
It's important to note that even when using the -XX:hashCode=4 option, the hash code may not always correspond to the object address due to potential object movement.
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