diff --git a/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByBusinessKey.java b/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByBusinessKey.java
index 3e34f97d77..655db4e575 100644
--- a/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByBusinessKey.java
+++ b/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByBusinessKey.java
@@ -40,15 +40,17 @@ public class EqualByBusinessKey {
 
     @Override
     public boolean equals(Object obj) {
-        if (this == obj)
+        if (this == obj) {
             return true;
-        if (obj == null)
+        }
+        if (obj == null) {
             return false;
-        if (obj instanceof EqualByBusinessKey)
-            if (((EqualByBusinessKey) obj).getEmail() == getEmail())
+        }
+        if (obj instanceof EqualByBusinessKey) {
+            if (((EqualByBusinessKey) obj).getEmail() == getEmail()) {
                 return true;
-
+            }
+        }
         return false;
     }
-
 }
diff --git a/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualById.java b/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualById.java
index f29a152f3e..cebfb5fcec 100644
--- a/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualById.java
+++ b/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualById.java
@@ -41,14 +41,15 @@ public class EqualById {
 
     @Override
     public boolean equals(Object obj) {
-        if (this == obj)
+        if (this == obj) {
             return true;
-        if (obj == null)
+        }
+        if (obj == null) {
             return false;
-        if (obj instanceof EqualById)
-            return ((EqualById) obj).getId() == getId();
-
+        }
+        if (obj instanceof EqualById) {
+            return ((EqualById) obj).getId().equals(getId());
+        }
         return false;
     }
-
 }
diff --git a/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByJavaDefault.java b/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByJavaDefault.java
index 04a81865c6..b312845b61 100644
--- a/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByJavaDefault.java
+++ b/persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByJavaDefault.java
@@ -30,9 +30,7 @@ public class EqualByJavaDefault implements Cloneable{
         this.email = email;
     }
 
-    public Object clone() throws
-            CloneNotSupportedException
-    {
+    public Object clone() throws CloneNotSupportedException {
         return super.clone();
     }
 }
diff --git a/persistence-modules/java-jpa-3/src/test/java/com/baeldung/jpa/equality/EqualityUnitTest.java b/persistence-modules/java-jpa-3/src/test/java/com/baeldung/jpa/equality/EqualityUnitTest.java
index c672c9e460..03ac11b6fd 100644
--- a/persistence-modules/java-jpa-3/src/test/java/com/baeldung/jpa/equality/EqualityUnitTest.java
+++ b/persistence-modules/java-jpa-3/src/test/java/com/baeldung/jpa/equality/EqualityUnitTest.java
@@ -71,4 +71,4 @@ public class EqualityUnitTest {
         Assert.assertEquals(object1, object2);
         Assert.assertNotEquals(object1.getId(), object2.getId());
     }
-}
\ No newline at end of file
+}