Creating Class Diagram
In the low level design process, creating a class diagram is an important step. A class diagram provides a visual representation of the classes, their relationships, and the overall structure of the payment app.
A class diagram helps in organizing and understanding the various components of the app. It shows the classes, their attributes, methods, and the associations between classes.
To create a class diagram for the payment app, we need to identify the key entities and their relationships. For example, in the payment app, we may have entities such as User, Account, Payment, and Invoice. The relationships between these entities can be represented using different types of associations such as aggregation, composition, and inheritance.
Here is a simple example of a class diagram for the payment app:
1// Replace with your Java code
2
3// Payment Class
4public class Payment {
5 private double amount;
6 private String recipient;
7
8 public double getAmount() {
9 return amount;
10 }
11
12 public void setAmount(double amount) {
13 this.amount = amount;
14 }
15
16 public String getRecipient() {
17 return recipient;
18 }
19
20 public void setRecipient(String recipient) {
21 this.recipient = recipient;
22 }
23}
24
25// User Class
26public class User {
27 private String name;
28 private String email;
29
30 public String getName() {
31 return name;
32 }
33
34 public void setName(String name) {
35 this.name = name;
36 }
37
38 public String getEmail() {
39 return email;
40 }
41
42 public void setEmail(String email) {
43 this.email = email;
44 }
45}
46
47// Association between Payment and User
48class Association {
49 private User user;
50 private Payment payment;
51
52 // Replace with relevant code
53}xxxxxxxxxxclass Main { public static void main(String[] args) { // Replace with your Java logic here System.out.println("Creating Class Diagram for Payment App"); }}