Implemented all of the TODO sections, Added HybridCar class and its methods, removed comments.

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

@@ -1,16 +1,5 @@
 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 {
@@ -27,11 +16,39 @@ public class ElectricCar extends Car implements Chargeable {
         this.chargeLevel = chargeLevel;
     }
 
-    // TODO: Override getEnergyType() → return "Electric"
+    @Override
+    public String getEnergyType() {
+        return "Electric";
+    }
 
-    // TODO: Override showDetails()
+    @Override
+    public void showDetails() {
+        System.out.println("Battery capacity : " + this.batteryCapacity);
+        System.out.println("Charge level : " + this.chargeLevel);
+    }
 
-    // TODO: Implement charge(double amount)
-    // Validate negative
-    // Cap at 100
+    public void charge(double amount){
+        if (amount <= 0){
+            System.out.println("Charging amount should be positive.");
+            return;
+        }
+        if (chargeLevel + amount > 100){
+            System.out.println("Battery Full!");
+            return;
+        }
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (v.getMileage() > 8000){
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Battery system checked");
+        this.chargeLevel = 100;
+    }
 }