did my homework

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

@@ -0,0 +1,13 @@
+package core.basesyntax;
+
+public class Bulldozer extends Machine {
+ @Override
+ public void doWork() {
+ System.out.println("The bulldozer has started work");
+ }
+
+ @Override
+ public void stopWork() {
+ System.out.println("The bulldozer has stopped work");
+ }
+}

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

@@ -0,0 +1,13 @@
+package core.basesyntax;
+
+public class Excavator extends Machine {
+ @Override
+ public void doWork() {
+ System.out.println("The excavator has started work");
+ }
+
+ @Override
+ public void stopWork() {
+ System.out.println("The excavator has stopped work");
+ }
+}

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

@@ -0,0 +1,9 @@
+package core.basesyntax;
+
+public abstract class Machine {
+
+ public abstract void doWork();
+
+ public abstract void stopWork();
+
+}

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

@@ -1,5 +1,19 @@
 package core.basesyntax;
 
 public class MainApp {
+ public static void main(String[] args) {
+ Machine truck = new Truck();
+ Machine excavator = new Excavator();
+ Machine bulldozer = new Bulldozer();
 
+ Machine[] machineArray = new Machine[] {truck, excavator, bulldozer};
+ for (Machine machine : machineArray) {
+ machine.doWork();
+ }
+
+ for (Machine machine : machineArray) {
+ machine.stopWork();
+ }
+
+ }
 }

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

@@ -0,0 +1,13 @@
+package core.basesyntax;
+
+public class Truck extends Machine {
+ @Override
+ public void doWork() {
+ System.out.println("The truck has started work");
+ }
+
+ @Override
+ public void stopWork() {
+ System.out.println("The truck has stopped work");
+ }
+}