Which is the file extension used for a public Java class source code

The process of creating an object is called Instantiation .

When an object is created by a constructor of the class, the resulting object is called an instance of the class , and the member variables specific to the object are called instance variables, to contrast with the class variables shared across the class. …

So basically, an object is created from a class. In Java, the new keyword is used to create new objects. Declaration − A variable declaration with a variable name with an object type. Instantiation − The ‘new’ keyword is used to create the object.

An object is a value of a class, called an instance of the class . Instances are created with the generic construction primitive new, which takes the class and initialization values as arguments.