Customer liked with appointment table

src/main/java/org/example/petshopdesktop/database/CustomerDB.java

@@ -0,0 +1,43 @@
+package org.example.petshopdesktop.database;
+
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import org.example.petshopdesktop.models.Customer;
+
+import java.sql.*;
+
+public class CustomerDB {
+
+    //
+    // GET ALL CUSTOMERS
+    //
+    public static ObservableList<Customer> getCustomers()
+            throws SQLException {
+
+        ObservableList<Customer> list =
+                FXCollections.observableArrayList();
+
+        Connection conn = ConnectionDB.getConnection();
+
+        String sql = "SELECT * FROM customer";
+
+        Statement stmt = conn.createStatement();
+        ResultSet rs = stmt.executeQuery(sql);
+
+        while(rs.next()) {
+
+            Customer c = new Customer(
+                    rs.getInt("customerId"),
+                    rs.getString("firstName"),
+                    rs.getString("lastName"),
+                    rs.getString("email"),
+                    rs.getString("phone")
+            );
+
+            list.add(c);
+        }
+
+        conn.close();
+        return list;
+    }
+}

src/main/java/org/example/petshopdesktop/models/Customer.java

@@ -0,0 +1,75 @@
+package org.example.petshopdesktop.models;
+
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.beans.property.SimpleStringProperty;
+
+public class Customer {
+
+    private SimpleIntegerProperty customerId;
+    private SimpleStringProperty firstName;
+    private SimpleStringProperty lastName;
+    private SimpleStringProperty email;
+    private SimpleStringProperty phone;
+
+    // Constructor
+    public Customer(int customerId,
+                    String firstName,
+                    String lastName,
+                    String email,
+                    String phone) {
+
+        this.customerId = new SimpleIntegerProperty(customerId);
+        this.firstName = new SimpleStringProperty(firstName);
+        this.lastName = new SimpleStringProperty(lastName);
+        this.email = new SimpleStringProperty(email);
+        this.phone = new SimpleStringProperty(phone);
+    }
+
+    // Getters
+    public int getCustomerId() {
+        return customerId.get();
+    }
+
+    public String getFirstName() {
+        return firstName.get();
+    }
+
+    public String getLastName() {
+        return lastName.get();
+    }
+
+    public String getEmail() {
+        return email.get();
+    }
+
+    public String getPhone() {
+        return phone.get();
+    }
+
+    // Properties (optional but useful later)
+    public SimpleIntegerProperty customerIdProperty() {
+        return customerId;
+    }
+
+    public SimpleStringProperty firstNameProperty() {
+        return firstName;
+    }
+
+    public SimpleStringProperty lastNameProperty() {
+        return lastName;
+    }
+
+    public SimpleStringProperty emailProperty() {
+        return email;
+    }
+
+    public SimpleStringProperty phoneProperty() {
+        return phone;
+    }
+
+    // This controls how customer appears in ComboBox
+    @Override
+    public String toString() {
+        return getFirstName() + " " + getLastName();
+    }
+}