Encapsulation
Java supports the Encapsulation method that allows you to wrap the code and the data together within a single unit just like a capsule. You can use the private access modifier to make the encapsulated class in Java. you can easily set and get the data using setter and getter methods. For example- Java Bean.
Encapsulation Features-
- You can make any class read-only or write-only by using getter and setter method.
- It allows you to control the data stored by providing logic within the setter method.
- It allows the data hiding as other class would not be able to access the private data members of other class.
- It allows for easy unit testing.
Example-
Pack file-
package Simple_pack;
public class Pack{
private int var;
public int getVar(){
return var; }
public void setVar(int v)
{
var=v;
}
}
Simple file-
package Simple_pack;
//import demo_pack.*;
class Simple {
public static void main(String args[]){
Pack d=new Pack();
d.setVar(6);
System.out.println(d.getVar());
}
}
Output-
