Encapsulation in Java || Getter and Setter Method in Java || Java OOPs Concepts Tutorials
=== Video link === Access Modifiers In Java : https://youtu.be/CkBCAOPdl6w - The process of binding data and corresponding methods (behavior) together into a single unit is called encapsulation in Java. === What is encapsulation? === - The whole idea behind encapsulation is to hide the implementation details from users. If a data member is private it means it can only be accessed within the same class. - No outside class can access private data member (variable) of other class. -If we setup public getter and setter methods to update and read the private data fields then the outside class can access those private data fields via public methods. - This way data can only be accessed by public methods thus making the private fields and their implementation hidden for outside classes. - That’s why encapsulation is known as data hiding. - In the encapsulation technique, we declare fields as private in the class to prevent other classes from accessing them directly. - The required encapsulated data can be accessed by using public Java getter and setter method. === Getter method in Java === - A method which is used to retrieve/get the value of a variable or return the value of the private member variable is called getter method in Java. - This method is also known as accessor method. - The signature of a getter method in Java : public returnType getPropertyName() === Setter method in Java === - A method which is used for updating or setting the value of a variable is called setter method in Java. - This method is also known as mutator method. - By using the setter method, we can modify the value of a variable. - Just like with the getter method, we should create a setter method for every variable in the class. - The signature of setter method in Java : public void setPropertyName(dataType propertyValue) === Naming convention of Getter and Setter method === - For example: If the variable is the type of int, you will declare like this: private int number; then appropriate getter and setter will be like this: public getNumber() { } public void setNumber(int number) { } === Key points === 1. If you define only the getter method, it can be made read-only. 2. If you define only the setter method, it can be made write-only. 3. If you define both getter and setter methods, it can be made read-write. #JavaOOPsConceptsTutorials #LearningandTeachingCoding
=== Video link === Access Modifiers In Java : https://youtu.be/CkBCAOPdl6w - The process of binding data and corresponding methods (behavior) together into a single unit is called encapsulation in Java. === What is encapsulation? === - The whole idea behind encapsulation is to hide the implementation details from users. If a data member is private it means it can only be accessed within the same class. - No outside class can access private data member (variable) of other class. -If we setup public getter and setter methods to update and read the private data fields then the outside class can access those private data fields via public methods. - This way data can only be accessed by public methods thus making the private fields and their implementation hidden for outside classes. - That’s why encapsulation is known as data hiding. - In the encapsulation technique, we declare fields as private in the class to prevent other classes from accessing them directly. - The required encapsulated data can be accessed by using public Java getter and setter method. === Getter method in Java === - A method which is used to retrieve/get the value of a variable or return the value of the private member variable is called getter method in Java. - This method is also known as accessor method. - The signature of a getter method in Java : public returnType getPropertyName() === Setter method in Java === - A method which is used for updating or setting the value of a variable is called setter method in Java. - This method is also known as mutator method. - By using the setter method, we can modify the value of a variable. - Just like with the getter method, we should create a setter method for every variable in the class. - The signature of setter method in Java : public void setPropertyName(dataType propertyValue) === Naming convention of Getter and Setter method === - For example: If the variable is the type of int, you will declare like this: private int number; then appropriate getter and setter will be like this: public getNumber() { } public void setNumber(int number) { } === Key points === 1. If you define only the getter method, it can be made read-only. 2. If you define only the setter method, it can be made write-only. 3. If you define both getter and setter methods, it can be made read-write. #JavaOOPsConceptsTutorials #LearningandTeachingCoding