From 7fdecf6d83f18fca009ff3feb3d4150b0a84223b Mon Sep 17 00:00:00 2001
From: Daryna Mitina <mitinadari@gmail.com>
Date: Fri, 8 May 2026 03:58:33 +0300
Subject: [PATCH 1/2] Created abstract class Machine with doWork() and
 stopWork() methods. Implemented Excavator, Bulldozer, Truck classes with
 method overrides.

---
 src/main/java/core/basesyntax/Bulldozer.java | 13 +++++++++++++
 src/main/java/core/basesyntax/Excavator.java | 13 +++++++++++++
 src/main/java/core/basesyntax/Machine.java   |  7 +++++++
 src/main/java/core/basesyntax/MainApp.java   | 12 ++++++++++++
 src/main/java/core/basesyntax/Truck.java     | 13 +++++++++++++
 5 files changed, 58 insertions(+)
 create mode 100644 src/main/java/core/basesyntax/Bulldozer.java
 create mode 100644 src/main/java/core/basesyntax/Excavator.java
 create mode 100644 src/main/java/core/basesyntax/Machine.java
 create mode 100644 src/main/java/core/basesyntax/Truck.java

diff --git a/src/main/java/core/basesyntax/Bulldozer.java b/src/main/java/core/basesyntax/Bulldozer.java
new file mode 100644
index 000000000..e8d650725
--- /dev/null
+++ b/src/main/java/core/basesyntax/Bulldozer.java
@@ -0,0 +1,13 @@
+package core.basesyntax;
+
+public class Bulldozer extends Machine {
+    @Override
+    void doWork() {
+        System.out.println("Bulldozer started working");
+    }
+
+    @Override
+    void stopWork() {
+        System.out.println("Bulldozer stopped working");
+    }
+}
diff --git a/src/main/java/core/basesyntax/Excavator.java b/src/main/java/core/basesyntax/Excavator.java
new file mode 100644
index 000000000..bef96e3b7
--- /dev/null
+++ b/src/main/java/core/basesyntax/Excavator.java
@@ -0,0 +1,13 @@
+package core.basesyntax;
+
+public class Excavator extends Machine {
+    @Override
+    void doWork() {
+        System.out.println("Excavator started working");
+    }
+
+    @Override
+    void stopWork() {
+        System.out.println("Excavator stopped working");
+    }
+}
diff --git a/src/main/java/core/basesyntax/Machine.java b/src/main/java/core/basesyntax/Machine.java
new file mode 100644
index 000000000..4d651f320
--- /dev/null
+++ b/src/main/java/core/basesyntax/Machine.java
@@ -0,0 +1,7 @@
+package core.basesyntax;
+
+abstract class Machine {
+    abstract void doWork();
+
+    abstract void stopWork();
+}
diff --git a/src/main/java/core/basesyntax/MainApp.java b/src/main/java/core/basesyntax/MainApp.java
index f99e9a019..6376cad3f 100644
--- a/src/main/java/core/basesyntax/MainApp.java
+++ b/src/main/java/core/basesyntax/MainApp.java
@@ -1,5 +1,17 @@
 package core.basesyntax;
 
 public class MainApp {
+    public static void main(String[] args) {
+        Machine truck = new Truck();
+        Machine bulldozer = new Bulldozer();
+        Machine excavator = new Excavator();
 
+        excavator.doWork();
+        truck.doWork();
+        bulldozer.doWork();
+
+        excavator.stopWork();
+        truck.stopWork();
+        bulldozer.stopWork();
+    }
 }
diff --git a/src/main/java/core/basesyntax/Truck.java b/src/main/java/core/basesyntax/Truck.java
new file mode 100644
index 000000000..fb1377f8d
--- /dev/null
+++ b/src/main/java/core/basesyntax/Truck.java
@@ -0,0 +1,13 @@
+package core.basesyntax;
+
+public class Truck extends Machine {
+    @Override
+    void doWork() {
+        System.out.println("Truck started working");
+    }
+
+    @Override
+    void stopWork() {
+        System.out.println("Truck stopped working");
+    }
+}

From 31031958228ed25141c757ac7162977a61128c18 Mon Sep 17 00:00:00 2001
From: Daryna Mitina <mitinadari@gmail.com>
Date: Fri, 8 May 2026 04:21:25 +0300
Subject: [PATCH 2/2] Add public modifiers to classes and loop logic in
 MainApp.

---
 src/main/java/core/basesyntax/Bulldozer.java |  4 ++--
 src/main/java/core/basesyntax/Excavator.java |  4 ++--
 src/main/java/core/basesyntax/Machine.java   |  4 ++--
 src/main/java/core/basesyntax/MainApp.java   | 16 +++++-----------
 src/main/java/core/basesyntax/Truck.java     |  4 ++--
 5 files changed, 13 insertions(+), 19 deletions(-)

diff --git a/src/main/java/core/basesyntax/Bulldozer.java b/src/main/java/core/basesyntax/Bulldozer.java
index e8d650725..124a533e5 100644
--- a/src/main/java/core/basesyntax/Bulldozer.java
+++ b/src/main/java/core/basesyntax/Bulldozer.java
@@ -2,12 +2,12 @@
 
 public class Bulldozer extends Machine {
     @Override
-    void doWork() {
+    public void doWork() {
         System.out.println("Bulldozer started working");
     }
 
     @Override
-    void stopWork() {
+    public void stopWork() {
         System.out.println("Bulldozer stopped working");
     }
 }
diff --git a/src/main/java/core/basesyntax/Excavator.java b/src/main/java/core/basesyntax/Excavator.java
index bef96e3b7..418773a88 100644
--- a/src/main/java/core/basesyntax/Excavator.java
+++ b/src/main/java/core/basesyntax/Excavator.java
@@ -2,12 +2,12 @@
 
 public class Excavator extends Machine {
     @Override
-    void doWork() {
+    public void doWork() {
         System.out.println("Excavator started working");
     }
 
     @Override
-    void stopWork() {
+    public void stopWork() {
         System.out.println("Excavator stopped working");
     }
 }
diff --git a/src/main/java/core/basesyntax/Machine.java b/src/main/java/core/basesyntax/Machine.java
index 4d651f320..474d05768 100644
--- a/src/main/java/core/basesyntax/Machine.java
+++ b/src/main/java/core/basesyntax/Machine.java
@@ -1,7 +1,7 @@
 package core.basesyntax;
 
 abstract class Machine {
-    abstract void doWork();
+    public abstract void doWork();
 
-    abstract void stopWork();
+    public abstract void stopWork();
 }
diff --git a/src/main/java/core/basesyntax/MainApp.java b/src/main/java/core/basesyntax/MainApp.java
index 6376cad3f..2ff8b790a 100644
--- a/src/main/java/core/basesyntax/MainApp.java
+++ b/src/main/java/core/basesyntax/MainApp.java
@@ -2,16 +2,10 @@
 
 public class MainApp {
     public static void main(String[] args) {
-        Machine truck = new Truck();
-        Machine bulldozer = new Bulldozer();
-        Machine excavator = new Excavator();
-
-        excavator.doWork();
-        truck.doWork();
-        bulldozer.doWork();
-
-        excavator.stopWork();
-        truck.stopWork();
-        bulldozer.stopWork();
+        Machine[] machines = {new Truck(), new Bulldozer(), new Excavator()};
+        for (Machine machine : machines) {
+            machine.doWork();
+            machine.stopWork();
+        }
     }
 }
diff --git a/src/main/java/core/basesyntax/Truck.java b/src/main/java/core/basesyntax/Truck.java
index fb1377f8d..35b6038f3 100644
--- a/src/main/java/core/basesyntax/Truck.java
+++ b/src/main/java/core/basesyntax/Truck.java
@@ -2,12 +2,12 @@
 
 public class Truck extends Machine {
     @Override
-    void doWork() {
+    public void doWork() {
         System.out.println("Truck started working");
     }
 
     @Override
-    void stopWork() {
+    public void stopWork() {
         System.out.println("Truck stopped working");
     }
 }