Added Callback

Author: NadavMozeson

src/BehavioralPatterns/Callback/Callback.java

@@ -0,0 +1,5 @@
+package BehavioralPatterns.Callback;
+
+public interface Callback {
+    void onComplete(String result);
+}

src/BehavioralPatterns/Callback/CallbackImpl.java

@@ -0,0 +1,8 @@
+package BehavioralPatterns.Callback;
+
+class CallbackImpl implements Callback {
+    @Override
+    public void onComplete(String result) {
+        System.out.println("Processing complete. Result: " + result);
+    }
+}

src/BehavioralPatterns/Callback/DataProcessor.java

@@ -0,0 +1,8 @@
+package BehavioralPatterns.Callback;
+
+public class DataProcessor {
+    void processData(String data, Callback callback) {
+        String processedData = data.toUpperCase();
+        callback.onComplete(processedData);
+    }
+}

src/BehavioralPatterns/Callback/Main.java

@@ -0,0 +1,10 @@
+package BehavioralPatterns.Callback;
+
+public class Main {
+    public static void main(String[] args) {
+        DataProcessor processor = new DataProcessor();
+        Callback callback = new CallbackImpl();
+        String inputData = "Hello, World!";
+        processor.processData(inputData, callback); // -> "Processing complete. Result: HELLO, WORLD!"
+    }
+}