Java 6 Illuminated: An Active Learning Approach, 2nd Edition



Type casting is discussed in

Chapter 2.

REFERENCE POINT

7.10 The toString and equals Methods 407

with comparing o’s fields and this Auto object’s fields. Before performing

the comparison, we must cast the Object reference o to an Auto (line 116).

Otherwise, there would be a compiler error when trying to access the

instance variable model with the Object o, because model is an instance vari-

able of class Auto and not of class Object.

We compare each instance variable in the parameter object, objAuto, with

the same instance variable in this object. We return true if the correspon-

ding instance variables in each object have the same values; otherwise, ...