Patient

public class Patient {

    private int id, age;
    private BloodData bloodData;

    public Patient() {
        this(0,0,new BloodData("O", "+"));
    }

    public Patient(int id, int age, BloodData bloodData) {
        this.id = id;
        this.age = age;
        this.bloodData = new BloodData(bloodData.getType(),bloodData.getRH());
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public BloodData getBloodData() {
        return bloodData;
    }

    public void setBloodData(BloodData bloodData) {
        this.bloodData = bloodData;
    }

    @Override
    public String toString() {
        return "ID: " + id +
                "\nAge: " + age +
                "\nBlood Data: " + getBloodData();
    }
}