Java Buzz Forum - Program on encapsulation

Binding the data with its related functionalities known as encapsulation
Here data means variables and functionalities means methods.
So keeping the variable and related methods in one place.
That place is "class". class is the base for encapsulation.
Lets see example program on encapsulation, how the variables and methods defined in a class.

The above example program shows how the variables and methods will be there in a class.
So class is the base for encapsulation
class is user defined data type in java means by using class we can structure our own programs.
Lest see a example program on class.

package com.instanceofjava;
public class ClassDemo {
//variables of a class
String empName;
int empId;
String Designation;
//getter and setter methods for variables
//by using these methods we can set the value to the variable and gat the value from the
//variables
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public int getEmpId() {
return empId;
}
public void setEmpId(int empId) {
this.empId = empId;
}
public String getDesignation() {
return Designation;
}
public void setDesignation(String designation) {
Designation = designation;
}
}

Instance of class is known as object.
Instance means dynamic memory allocation. So dynamic memory allocation to class is called object.
By using "new" keyword the object will be created dynamically.
Class is a template. By using object we will get memory for all variables so that we can use them.
We can create number of objects for one class based on our requirements.
Below an example program on class and object.


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