From 8f7559df5e861e2cb0ee2139718a59e534abf0d5 Mon Sep 17 00:00:00 2001
From: Felipe Reis <felipe@glr.com.br>
Date: Mon, 30 Jan 2017 15:14:50 -0200
Subject: [PATCH] BAEL-612: used lambda instead of anonymous class

---
 .../baeldung/concurrent/future/SquareCalculator.java | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/core-java/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java b/core-java/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java
index 29c4ae53ce..e53a2413d1 100644
--- a/core-java/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java
+++ b/core-java/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java
@@ -1,6 +1,5 @@
 package com.baeldung.concurrent.future;
 
-import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Future;
 
@@ -13,12 +12,9 @@ public class SquareCalculator {
     }
 
     public Future<Integer> calculate(Integer input) {
-        return executor.submit(new Callable<Integer>() {
-            @Override
-            public Integer call() throws Exception {
-                Thread.sleep(1000);
-                return input * input;
-            }
-        });
+        return executor.submit(() -> {
+            Thread.sleep(1000);
+            return input * input;
+        });        
     }
 }