Write a program in java to a class called Employee which
having the following instance variables.
The class Employee must have a parameterized constructor
only name as the argument and initializes the name variable.
Proceed with same class....
write a method called empAge to change the state of age
variable after passing an integer value.
write a method called empDesignation to change the state of
variable designation after passing a string.
write a method called empSalary to change the state of
variable after passing a double type value.
After writing the main method create an instance of the
Employee and enter the following details and check your
construction by printing it.