Showing posts with the label Java Stuff

What is Encapsulation in Java?

Encapsulation is a mechanism of binding code and data together in a single unit. Let’s take an example of Capsule. Different powdered or liquid medicines are encapsulated inside a capsule. Likewise in encapsulation, all the methods and variables are wrapped together in a single class. However if we setup public getter and setter methods to update (for example  void setAge(int age) )and read (for example   int getAge() ) 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.  Lets see an example to understand this concept better. Example of Encapsulation: /* Create a class */ public class Encapsulation { private String name ; private int age ; public int getAge () { return age ; } publ

What are Java Variables and Data Types?

1. What is a Java Variable? A variable can be called a container that holds some value in a Java program.  The variable has assigned a data type that defines what type of value the variable can hold.  The variable has a name which locates in the memory.  If you want to use a variable in a program, there are two steps associated with it you have to perform: Variable Declaration Variable Initialization i. Variable Declaration