Class objects

Creating an Object Declaration − A variable declaration with a variable name with an object type . Instantiation − The ‘new’ keyword is used to create the object. Initialization − The ‘new’ keyword is followed by a call to a constructor. This call initializes the new object.

In computer programming, the object class refers to a class created to group various objects which are instances of that class . Classes are code templates for creating objects. In cases where objects need to be grouped in a certain way, an object class is the “container” for a set of objects built on these templates.

Object Data Type: These are also referred to as Non-primitive or Reference Data Type . They are so-called because they refer to any particular objects. Unlike the primitive data types, the non-primitive ones are created by the users in Java. Examples include arrays, strings, classes, interfaces etc.

The Object class is the parent class of all the classes in java by default . In other words, it is the topmost class of java. The Object class is beneficial if you want to refer any object whose type you don’t know. Notice that parent class reference variable can refer the child class object, know as upcasting.