complete workshop assignments

src/main/java/org/model/Vehicle.java

@@ -20,15 +20,27 @@ public abstract class Vehicle {
         this.mileage = mileage;
     }
 
-    // TODO: Create getters for all fields
+    public String getBrand() {return brand;}
 
-    // TODO: Implement addMileage(double km)
-    // If km is negative → print error
-    // Otherwise increase mileage
+    public String getModel() {return model;}
 
-    // TODO: Declare abstract method getEnergyType()
+    public int getYear() {return year;}
 
-    public void basicInfo() {
+    public double getMileage() {return mileage;}
+
+    public void addMileage(double km)
+    {
+        if (km < 0)
+            System.out.println("Error: Mileage cannot be negative.");
+        else
+            this.mileage += km;
+    }
+
+
+    public abstract String getEnergyType();
+
+    public void basicInfo()
+    {
         System.out.println(
                 year + " " + brand + " " + model +
                         " | Mileage: " + mileage +