UML Class Diagram to Java Code – Hospital Management System

In software engineering, a class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system’s classes, their attributes, operations (or methods), and the relationships among objects. The class diagram is the main building block of object-oriented modelling. It is used for general conceptual modelling of the systematic of the application, and for detailed modelling translating the models into programming code. Class diagrams can also be used for data modeling. The classes in a class diagram represent both the main elements, interactions in the application, and the classes to be programmed. 

Note: I build this project for Bachelor of Engineering for Software Modeling Design Programs

Here is the UML Class Diagram for Hospital Management System implemented in Java.

Hospital Management System Source Code

User.java

package SMD1;

import java.io.*;
import java.util.Scanner;

public class User {

    public static void main(String[] args) {
        System.out.println("Enter your choice:1)Receptionist 2)Paient 3)Doctor");
        Scanner sc = new Scanner(System.in);
        int choice = sc.nextInt();

        do {
            switch (choice) {
                case 1:
                    Receptionist R = new Receptionist();
                    R.Choice();
                    break;
                case 2:
                    Patient P = new Patient();
                    P.Choice();
                    break;
                case 3:
                    Doctor D = new Doctor();
                    D.Choice();
                    break;
            }
        } while (choice != 4);
    }

}

Receptionist.java

package SMD1;

import java.io.*;
import java.util.Scanner;

public class Receptionist extends User {

    private int r_id;
    private String r_name;

    public void Choice() {
        System.out.println("Enter your choice:1)GiveAppoint 2)GenerateBill");
        Scanner sc = new Scanner(System.in);
        int choice = sc.nextInt();

        switch (choice) {
            case 1:
                GiveAppoint();
                break;
            case 2:
                GenerateBill();
                break;
            case 3:
                main(null);
        }

    }

    public void GenerateBill() {

        Billing B = new Billing();
        int b_no = B.getB_no();
        String p_name = B.getP_name();
        int p_id = B.getP_id();
        int b_amt = B.getB_amt();
        System.out.println(
                "BillNO: " + b_no + "\n PatientID: " + p_id + "\nPatientName: " + p_name + "\nBillAmount: " + b_amt);

    }

    public void GiveAppoint() {

        Patient P = new Patient();
        String p_name = P.getP_name();
        int p_id = P.getP_id();
        Doctor D = new Doctor();
        int d_id = D.getD_id();
        String d_name = D.getD_name();
        System.out.println(
                "\n PatientID: " + p_id + "\nPatientName: " + p_name + "\nAppointment with Doctor \nDoctorID: " + d_id +
                        "\nDoctorName" + d_name);

    }

}

Patient.java

package SMD1;

import java.util.Scanner;

public class Patient extends User {

    private int p_id = 101;
    private String p_name = "Anushka";

    public void Choice() {
        System.out.println("Enter your choice:1)PayBill");
        Scanner sc = new Scanner(System.in);
        int choice = sc.nextInt();

        switch (choice) {
            case 1:
                PayBill();
                break;
            case 2:
                main(null);

        }

    }

    public int getP_id() {
        return p_id;
    }

    public void setP_id(int p_id) {
        this.p_id = p_id;
    }

    public String getP_name() {
        return p_name;
    }

    public void setP_name(String p_name) {
        this.p_name = p_name;
    }

    public void PayBill() {
        System.out.println("Thanks For Paying Bill");
    }

}

Doctor.java

package SMD1;

import java.util.Scanner;

public class Doctor extends User {

    private int d_id = 301;
    private String d_name = "Raju Rastogi";

    public int getD_id() {
        return d_id;
    }

    public void setD_id(int d_id) {
        this.d_id = d_id;
    }

    public String getD_name() {
        return d_name;
    }

    public void setD_name(String d_name) {
        this.d_name = d_name;
    }

    public void Choice() {
        System.out.println("Enter your choice:1)CheckPatient");
        Scanner sc = new Scanner(System.in);
        int choice = sc.nextInt();

        switch (choice) {
            case 1:
                CheckPatient();
                break;
            case 2:
                main(null);

        }
    }

    public void CheckPatient() {
        Patient P = new Patient();
        String p_name = P.getP_name();
        int p_id = P.getP_id();
        System.out.println("Doctor: " + d_name + " has check patient " + p_name);
    }

}

Billing.java

package SMD1;

public class Billing {

    private int b_no = 201;
    private int b_amt = 1000;
    Patient P = new Patient();
    String p_name = P.getP_name();
    int p_id = P.getP_id();

    public String getP_name() {
        return p_name;
    }

    public int getB_no() {
        return b_no;
    }

    public int getB_amt() {
        return b_amt;
    }

    public Patient getP() {
        return P;
    }

    public int getP_id() {
        return p_id;
    }

}