import java.lang.*; // import language package

interface Gross // interface declaration
{
	double ta=800.0;
	double da=1500.0; // final variable
	void gross_sal();
}

class Employee // super class declaration
{
	String name; // data member declaration
	float basic_sal;
	
	Employee(String n, float b) // super class constructor
	{
		name=n;
		basic_sal=b;
	}
	
	void display() // method to display value of data member
	{
		System.out.println("Name of Employee : "+name);
		System.out.println("Basic Salary of Employee : "+basic_sal);
	}
}

class Salary extends Employee implements Gross // sub class constructor
{
	float hra;

	Salary(String n, float b, float h) // sub class constructor
	{
		super(n,b);
		hra=h;
	}
	
	void disp()
	{
		display();
		System.out.println("HRA of Employee : "+hra);
	}
	
	public void gross_sal() // method to calculate gross salary
	{
		double gross_sal=basic_sal + ta + da + hra;
		System.out.println("TA of Employee : "+ta);
		System.out.println("DA of Employee : "+da);
		System.out.println("Gross Salary of Employee : "+gross_sal);
	}
}

public class EmpDetails {

	public static void main(String args[]) // main method
	{
		Salary s = new Salary("Sachin",8000,3000); // initiating Sub class
		s.disp();	// invoke method of sub class
		s.gross_sal();
	}
}