01. Briefly explain of following terms with appropriate examples.a. Class/ Template b. Object/ Instancec. Methods/ Functions d. Attributes/ Propertiese Reference Variables f. Primitive Variablesg. Method Parameters h. Local Variablesi. Default Values j. Declaration Values.k. Constructor l. Instance Blocksm. Static Variables n. Instance Variables
Question
- Briefly explain of following terms with appropriate examples.a. Class/ Template b. Object/ Instancec. Methods/ Functions d. Attributes/ Propertiese Reference Variables f. Primitive Variablesg. Method Parameters h. Local Variablesi. Default Values j. Declaration Values.k. Constructor l. Instance Blocksm. Static Variables n. Instance Variables
Solution
a. Class/ Template: A class is a blueprint or template for creating objects in object-oriented programming. For example, a class named "Car" might define properties such as color, brand, and model, and methods such as drive and park.
b. Object/ Instance: An object is an instance of a class. It's a concrete entity based on a class and is sometimes referred to as an instance. For example, if "Car" is a class, then a specific car like a red Toyota Corolla is an object of the Car class.
c. Methods/ Functions: Methods are functions defined inside the body of a class. They are used to perform operations with the attributes of our objects. For example, a method in the "Car" class might be "drive" or "park".
d. Attributes/ Properties: Attributes are the characteristics of an object. These are set by defining variables in the class. For example, a "Car" class might have attributes like color, brand, and model.
e. Reference Variables: Reference variables are used to refer to an object. They are declared with a specific type which cannot be changed. For example, in the code "Car myCar = new Car()", "myCar" is a reference variable.
f. Primitive Variables: Primitive variables are the most basic data types and include int, float, boolean, char etc. They directly contain values.
g. Method Parameters: Method parameters are the inputs that are passed to a method. For example, in a method "drive(speed)", speed is a parameter.
h. Local Variables: Local variables are declared in methods, constructors, or blocks and are only visible within the scope of that method, constructor, or block.
i. Default Values: Default values are the values that variables take if no other value has been assigned. For example, for integers, the default value is 0.
j. Declaration Values: Declaration values are the values that are given to a variable when it is declared. For example, in the code "int a = 5;", 5 is the declaration value.
k. Constructor: A constructor in Java is a block of code similar to a method that’s called when an instance of an object is created. For example, in the "Car" class, a constructor might be used to set the brand and color of a new car.
l. Instance Blocks: Instance blocks in Java are used to initialize the instance data member. It is run each time an object of the class is created.
m. Static Variables: Static variables are variables that belong to the class, not any object of the class. They are initialized only once at the start of the execution.
n. Instance Variables: Instance variables are non-static variables and are declared in a class outside any method, constructor or block. They are created when an object is created with the use of the keyword 'new' and destroyed when the object is destroyed.
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