Adding ExecutorService files

Java/ExecutorService/ExecutorServiceMultiThread.java

@@ -0,0 +1,53 @@
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+class TaskOne implements Runnable{
+    @Override
+    public void run() {
+        System.out.println("Running task 1");
+        try {
+            Thread.sleep(5000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}
+
+class TaskTwo implements Runnable{
+    @Override
+    public void run() {
+        System.out.println("Running task 2");
+        try {
+            Thread.sleep(5000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}
+
+class TaskThree implements Runnable{
+    @Override
+    public void run() {
+        System.out.println("Running task 3");
+        try {
+            Thread.sleep(5000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}
+
+public class ExecutorServiceMultiThread {
+    public static void main(String[] args) {
+        ExecutorService service = Executors.newFixedThreadPool(3);
+        TaskOne firstTask = new TaskOne();
+        TaskTwo secondTask = new TaskTwo();
+        TaskThree thirdTask = new TaskThree();
+
+        service.execute(firstTask);
+        service.execute(secondTask);
+        service.execute(thirdTask);
+
+        service.shutdown();
+    }
+}