commit everything at once like an amateur (the mandatory part + bonus part)

src/main/java/org/model/ElectricCar.java

@@ -1,21 +1,10 @@
 package org.model;
 
-/*
- * ElectricCar extends Car.
- * It already inherits Serviceable from Car.
- *
- * Service logic for ElectricCar:
- * - needsService(): return true if mileage > 8000
- * - performService():
- *     Print "Battery system checked"
- *     Reset chargeLevel to 100
- */
-
 import org.behavior.Chargeable;
 
 public class ElectricCar extends Car implements Chargeable {
 
-    private int batteryCapacity;
+    private final int batteryCapacity;
     private double chargeLevel;
 
     public ElectricCar(String brand, String model, int year,
@@ -27,13 +16,47 @@ public class ElectricCar extends Car implements Chargeable {
         this.chargeLevel = chargeLevel;
     }
 
-    // TODO: Override getEnergyType() → return "Electric"
+    @Override
+    public String getEnergyType() {
+        return "Electric";
+    }
 
-    // TODO: Override showDetails()
-    // Call super.showDetails()
-    // Print battery capacity and charge level
+    @Override
+    public void showDetails()
+    {
+        super.showDetails();
 
-    // TODO: Implement charge(double amount)
-    // Validate negative
-    // Cap at 100
+        System.out.println(
+                "Battery capacity: " + batteryCapacity +
+                        "| Charge level: " + chargeLevel
+        );
+    }
+
+
+    @Override
+    public void charge(double amount) {
+        if (amount <= 0) {
+            System.out.println("An error occurred while charging the vehicle, value must be bigger than zero, " + amount + " is not");
+        }
+
+        if (chargeLevel + amount > 100) {
+            System.out.println("An error occurred while charging the vehicle, by adding this amount: " + amount + " vehicle's charge level exceeds battery capacity");
+        }
+
+        chargeLevel += amount;
+    }
+
+    @Override
+    public void performService() {
+        super.performService();
+
+        System.out.println("Battery system checked");
+
+        chargeLevel = 100;
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        return getMileage() > 8000;
+    }
 }