A Main Class?

import java.util.*;

class healthProfile {

    private String first;
    private String last;
    private char gender;
    private int birthMonth;
    private int birthDay;
    private int birthYear;
    private double height;
    private double weight;

    public healthProfile (String f, String l, char g, int m, int d, int y, double h, double w) {
        first = f;
        last = l;
        gender = g;
        birthMonth = m;
        birthDay = d;
        birthYear = y;
        height = h;
        weight = w;
    }

    public String getFirst() {
        return first;
    }

    public String getLast() {
        return last;
    }

    public char getGender() {
        return gender;
    }

    public int getBirthMonth() {
        return birthMonth;
    }

    public int getBirthDay() {
        return birthDay;
    }

    public int getBirthYear() {
        return birthYear;
    }

    public double getHeight() {
        return height;
    }

    public double getWeight() {
        return weight;
    }

    public void setFirst(String f) {
        first = f;
    }

    public void setLast(String l) {
        last = l;
    }

    public void setGender(char g) {
        gender = g;
    }

    public void setBirthMonth(int n) {
        birthMonth = n;
    }

    public void setBirthDay(int n) {
        birthDay = n;
    }

    public void setBirthYear(int n) {
        birthYear = n;
    }

    public void setHeight(double n) {
        height = n;
    }

    public void getWeight(double n) {
        weight = n;
    }

    public double calcBMI() {
        return (weight * 703) / (height * height);
    }

    public int calcAge() {
        Calendar cal = Calendar.getInstance();
        int day, month, year;
        day = cal.get(Calendar.DATE);
        month = cal.get(Calendar.MONTH) + 1;
        year = cal.get(Calendar.YEAR);
        if (month > birthMonth) {
            return year - birthYear;
        }
        if (month == birthMonth && day >= birthDay) {
            return year - birthYear;
        }
        return year - birthYear - 1;
    }

    public int calcMaxHR() {
        return 220 - calcAge();
    }

    public double targetMinHR() {
        return calcMaxHR() * .5;
    }

    public double targetMaxHR() {
        return calcMaxHR() * .75;
    }
}