add first commit

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

@@ -0,0 +1,11 @@
+package core.basesyntax;
+
+public class Bulldozer extends Machine {
+ public void doWork() {
+ System.out.println("Bulldozer started its work");
+ }
+
+ public void stopWork() {
+ System.out.println("Bulldozer stopped working");
+ }
+}

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

@@ -0,0 +1,11 @@
+package core.basesyntax;
+
+public class Excavator extends Machine {
+ public void doWork() {
+ System.out.println("Excavator started its work");
+ }
+
+ public void stopWork() {
+ System.out.println("Excavator stopped 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 +1,16 @@
 package core.basesyntax;
 
 public class MainApp {
+ public static void main(String[] args) {
 
+ Machine[] machines = new Machine[3];
+ machines[0] = new Truck();
+ machines[1] = new Bulldozer();
+ machines[2] = new Excavator();
+
+ for (Machine i : machines) {
+ i.doWork();
+ i.stopWork();
+ }
+ }
 }

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

@@ -0,0 +1,11 @@
+package core.basesyntax;
+
+public class Truck extends Machine {
+ public void doWork() {
+ System.out.println("Truck started its work");
+ }
+
+ public void stopWork() {
+ System.out.println("Truck stopped working");
+ }
+}