If two objects belong to different classes but have the same field values, will they produce the same hash code result?

In Java, the hash code of an object depends on the implementation of the hashCode() method. If two objects belong to different classes, even with identical field values, they may have different hash codes if the hashCode() method is implemented differently.

For example, if both classes use the standard implementation Object.hashCode(), then the hash codes will be different, as it is based on the memory address of the object by default.

However, if both classes override hashCode() so that it is calculated solely based on the field values, and these fields match, then the hash codes can be the same.

But in general, having the same field values does not guarantee the same hash code for objects of different classes.