diff --git a/pom.xml b/pom.xml
index 10e5035e..6bc3b3b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
     <groupId>manning</groupId>
     <artifactId>lambdasinaction</artifactId>
     <version>1.0</version>
-    
+
     <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
@@ -63,4 +63,4 @@
       </plugin>
     </plugins>
   </build>
-</project>
\ No newline at end of file
+</project>
diff --git a/src/main/java/mycorejava/IntegerTricks.java b/src/main/java/mycorejava/IntegerTricks.java
new file mode 100644
index 00000000..69cef7de
--- /dev/null
+++ b/src/main/java/mycorejava/IntegerTricks.java
@@ -0,0 +1,14 @@
+package mycorejava;
+
+public class IntegerTricks {
+
+    public static void main(String... args) {
+        int i1 = 1;
+        Integer io = new Integer(i1);
+        // line n1
+        Integer ib1 = i1;
+        Integer ib2 = 1;
+
+        System.out.println((i1 == io) + " " + (ib1 == ib2));
+    }
+}