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What is class in java...
Creating Objects
As you know, a class provides the blueprint for objects; you create an object from a class. Each of the following statements taken from the program creates an object and assigns it to a variable:
Point originOne = new Point(23, 94); Rectangle rectOne = new Rectangle(originOne, 100, 200); Rectangle rectTwo = new Rectangle(50, 100);
The first line creates an object of the class, and the second and third lines each create an object of the class.
Each of these statements has three parts (discussed in detail below):
- Declaration: The code set in bold are all variable declarations that associate a variable name with an object type.
- Instantiation: The keyword is a Java operator that creates the object.
- Initialization: The operator is followed by a call to a constructor, which initializes the new object.
Declaring a Variable to Refer to an Object
Previously, you learned that to declare a variable, you write:
This notifies the compiler that you will use name to refer to data whose type is type.
With a primitive variable, this declaration also
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