Object class-----Java

The object class is the parent class of all classes, and if a class does not explicitly identify inheriting another class using the extends keyword, then such a default inherits the object class
Method in the object class, suitable for all subclasses.

1 toString () method
The hash code (object address string) of the object returned when the ToString () method is defined in 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
In general, compare two objects when comparing his values to be consistent, so rewrite

Object class-----Java