The object class in Java

1.toString () method

The hash code (object address string) of the object returned when defining the ToString () method inside the object class

You can represent the properties of an object by overriding the ToString () method.

2.equals () method

Compares whether a reference to an object points to the same memory address

Dog dog = new Dog ();

In general, compare two objects to compare if they are equal, so rewrite them.

Obj.getclass () Class object: Focus on attribute information

Objects of the Obj class: focusing on data information

The object class in Java