jv-oop

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

@@ -0,0 +1,15 @@
+package core.basesyntax;
+
+public class Bulldozer extends Machine{
+
+  @Override
+  public void doWork() {
+    System.out.println("Bulldozer works");;
+  }
+
+  @Override
+  public void stopWork() {
+    System.out.println("Bulldozer stops");;
+  }
+
+}

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

@@ -0,0 +1,15 @@
+package core.basesyntax;
+
+public class Excavator extends Machine{
+
+  @Override
+  public void doWork() {
+    System.out.println("Excavator works");;
+  }
+
+  @Override
+  public void stopWork() {
+    System.out.println("Excavator stops");;
+  }
+
+}

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

@@ -0,0 +1,7 @@
+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[] machines = {new Truck(), new Bulldozer(), new Excavator()};
+
+    for (Machine machine : machines) {
+      machine.doWork();
+      machine.stopWork();
+    }
+
+
+
+  }
 
 }
+
+//In MainApp class create Machine array with Truck, Bulldozer and Excavator 
+//and call methods doWork() and stopWork() in a loop.

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

@@ -0,0 +1,15 @@
+package core.basesyntax;
+
+public class Truck extends Machine {
+
+  @Override
+  public void doWork() {
+    System.out.println("Truck works");;
+  }
+
+  @Override
+  public void stopWork() {
+    System.out.println("Truck stops");;
+  }
+
+}