The given code calculates the employees gross monthly salary, tax, net monthly salary.

import java.util.*;
import java.text.*;

class CalculateSalary 
{
    public static void main(String[] args){
        Scanner input=new Scanner(System.in);
        System.out.print("Enter Basic: ");
        double basic=input.nextDouble();
        System.out.print("Enter Tax(%): ");
        double tax=input.nextDouble();

        double tda=basic*.75;
        double thra=basic*.20;
        int medical=1250;
        double grosssalary=tda+thra+basic+medical;
        System.out.println("Gross Salary: "+grosssalary);
        double taxpaid=tax/100;
        double t=taxpaid * grosssalary;
        System.out.println("Tax to be paid is: "+t);
        double netsalary=grosssalary-t;
        System.out.println("Net Salary: "+netsalary);
        DecimalFormat df=new DecimalFormat("##.##");
        System.out.println(df.format(netsalary));
    }
}