Encapsulation

public class Encapsulation {
    String name;
    int workhour;
    int payment;
    private int income = workhour * payment;
    private double incomeTax;
    private double pensionContribution;
    private double totalSalary;
    private double healthInsurance;

    void incomeTax () {
        income = workhour*payment;
        if (income>=100) {
            incomeTax = income*10/100;
        }
        else if (income<0){
            System.out.println("Error.");
        }
        else {
            incomeTax = income*5/100;
        }
        System.out.println(incomeTax);
    }

    void pensionContribution () {
        pensionContribution = income*9/100;
    }

    void healthInsurance () {
        healthInsurance = income*2.5/100;
    }

    void totalSalary () {
        totalSalary = income-(incomeTax+pensionContribution+healthInsurance);
    }

    void display () {
        System.out.println("Name : " + name);
        System.out.println("Income : $" + income);
        System.out.println("Income Tax : $" + incomeTax);
        System.out.println("Pension Contribution : $" + pensionContribution);
        System.out.println("Health Insurance Payment : $" + healthInsurance);
        System.out.println("Total Salary : $" + totalSalary);
    }
}