Use NetBeansNote for all the above User-Defined Classes:• Provide appropriate validation code so the right values get populated in the instance variables. For example, the payrate should not be negative.Write a Java application (Client) program with a static method called generateEmployees( ) that returns a random list of 10 different types of Employee objects. You would use an ArrayList to store the employee objects that will be returned. Use a for loop to populate randomly different types of employee objects with some random data. You could possibly think of a range of values like 1 – 4. If random value is 1, create a HourlyEmployee object with some randomly generated data, if 2, a SalariedEmployee object with some random data and so on. I would leave it to your ingenuity to generate and populate these different Employee objects with other data like name etc. As these objects are generated, add them to your data structure (array or ArrayList that you are using). Finally, the method returns this ArrayList In the same application class, implement the main( ) method. Call the generateEmployees( ) static method and using a for loop to print the details of each of the employee along with their earnings on the output window. Exercise: IA company pays its employees on a weekly basis. The employees are of four types: Salaried employeesare paid a fixed weekly salary regardless of the number of hours worked, hourly employees are paid bythe hour and receive overtime pay (1.5 * wage) for all hours worked in excess of 40 hours, commissionemployees are paid a percentage of their sales and base-commission employees receive a base salaryplus a commission based on their gross sales. The company wants to implement a Java application thatperforms its payroll calculations polymorphically. (50 points)Hint: This programming exercise is similar to the AbstractClassExample posted in Blackboard underchapter 10.SalariedEmployeeEmployee ClassCommission EmployeeBasePlusCommission EmployeeEmployee hierarchy UML Class diagramHourlyEmployee 1. Write an Abstract Java class - Employee that encapsulates an employee's first name, last name,SSN. Implement the appropriate get and set methods along with toString() method andequals() method. Note: An abstract class is a class that cannot be instantiated. The class isdeclared as follows: public abstract class EmployeeAlso, provide an abstract method called get Earnings() with a return type of double type. Thepurpose of the getEarnings() method is to return the earnings that each type of employeemakes. Note: an abstract method is a method with no body. Below is it's declarationpublic abstract double getEarnings ();2. Create a Java class - Salaried Employee which is a special type of Employee with the followingadditional attribute: weeklySalary. Provide appropriate get, set and equals(), toString()methods. Implement a newer version of getEarnings() method that returns the earnings ofSalaried Employee: weeklySalary.3. Create another Java class - HourlyEmployee which is another special type of Employee with theadditional attributes: wage and hours. Provide an appropriate set and get methods along withequals(), toString method. Also, implement a newer version of getEarnings() method thatreflects earnings of HourlyEmployee. (Note: take into the account the rules for calculating theearnings for the hourly employee as stated earlier in the problem description)4. Create Java class-Commission Employee, another type of employee with attributes: grossSalesand commission Rate. Provide set, get and equals(), toString() methods. Provide a newerversion of getEarnings() method that returns the earnings as (commission Rate * grossSales).5. Implement a specialized type of Commission Employee called BasePlusCommission Employeeclass which has an additional attribute: base salary. Provide get, set and equals(), toString()methods. Implement the getEarnings() method that returns the earnings as (commission RategrossSales) + baseSalary.*Note for all the above User-Defined Classes:• Provide appropriate validation code so the right values get populated in the instance variables.For example, the payrate should not be negative.Write a Java application (Client) program with a static method called generate Employees() that returnsa random list of 10 different types of Employee objects. You would use an ArrayList to store theemployee objects that will be returned. Use a for loop to populate randomly different types of employeeobjects with some random data. You could possibly think of a range of values like 1-4. If random valueis 1, create a HourlyEmployee object with some randomly generated data, if 2, a Salaried Employeeobject with some random data and so on. I would leave it to your ingenuity to generate and populate

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package :…