Final solution

src/main/java/core/basesyntax/Bulldozer.java

@@ -0,0 +1,17 @@
+package core.basesyntax;
+
+public class Bulldozer extends Machine{
+
+
+ @Override
+ public void doWork() {
+ System.out.println("Bulldozer start working!");
+ }
+
+ @Override
+ public void stopWork() {
+ System.out.println("Bulldozer stop working!");
+
+ }
+
+}

src/main/java/core/basesyntax/Excavator.java

@@ -0,0 +1,16 @@
+package core.basesyntax;
+
+public class Excavator extends Machine {
+
+
+ @Override
+ public void doWork() {
+ System.out.println("Excavator start working!");
+ }
+
+ @Override
+ public void stopWork() {
+ System.out.println("Excavator stop working!");
+
+ }
+}

src/main/java/core/basesyntax/Machine.java

@@ -0,0 +1,6 @@
+package core.basesyntax;
+
+public abstract class Machine {
+ public abstract void doWork();
+ public abstract void stopWork();
+}

src/main/java/core/basesyntax/MainApp.java

@@ -1,5 +1,32 @@
 package core.basesyntax;
 
 public class MainApp {
+ public static void main(String[] args) {
+ Machine truck;
+ truck = new Truck();
 
+ Machine bulldozer = new Bulldozer();
+
+ Machine excavator = new Excavator();
+ //tablica z obiektami
+
+ Machine[] carPark = {truck , bulldozer , excavator };
+
+ // stworzyc petle for ktora wyswietli do i stop work
+
+ for (int i = 0; i < carPark.length; i++) {
+ carPark[i].doWork();
+ carPark[i].stopWork();
+
+
+ }
+
+
+ // stworzyc maszyny z podanych wczesniej 3 typow
+ // i sprawdzic czy wywietlaja sie wiadomosci na konsoli
+
+
+
+ }
 }
+

src/main/java/core/basesyntax/Truck.java

@@ -0,0 +1,16 @@
+package core.basesyntax;
+
+public class Truck extends Machine {
+
+ @Override
+ public void doWork() {
+ System.out.println("Truck start working!");
+
+ }
+
+ @Override
+ public void stopWork() {
+ System.out.println("Truck stop working!");
+
+ }
+}