feat(hw-03): implement Adapter pattern

hw-03/project-root/app/src/main/java/org/example/App.java

@@ -3,12 +3,21 @@
  */
 package org.example;
 
-public class App {
-    public String getGreeting() {
-        return "Hello World!";
-    }
+import org.example.adapter.*;
 
-    public static void main(String[] args) {
-        System.out.println(new App().getGreeting());
-    }
+public class App {
+  public static void main(String[] args) {
+    run();
+  }
+
+  private static void run() {
+    checkAdapterPattern();
+  }
+
+  private static void checkAdapterPattern() {
+    Adaptee adaptee = new Adaptee();
+    Target target = new Adapter(adaptee);
+
+    target.methodWithoutArguments();
+  }
 }

hw-03/project-root/app/src/main/java/org/example/adapter/Adaptee.java

@@ -0,0 +1,9 @@
+package org.example.adapter;
+
+/** Adaptee */
+public class Adaptee {
+
+  public void methodWithArgument(int argument) {
+    System.out.println("Был передан аргумент " + argument);
+  }
+}

hw-03/project-root/app/src/main/java/org/example/adapter/Adapter.java

@@ -0,0 +1,21 @@
+package org.example.adapter;
+
+import java.util.Random;
+
+/** Adapter */
+public class Adapter implements Target {
+
+  public Adapter(Adaptee adaptee) {
+    this.adaptee = adaptee;
+    this.random = new Random();
+  }
+
+  @Override
+  public void methodWithoutArguments() {
+    int argument = random.nextInt();
+    adaptee.methodWithArgument(argument);
+  }
+
+  private final Adaptee adaptee;
+  private Random random;
+}

hw-03/project-root/app/src/main/java/org/example/adapter/Target.java

@@ -0,0 +1,7 @@
+package org.example.adapter;
+
+/** Target */
+public interface Target {
+
+  void methodWithoutArguments();
+}