diff --git a/spring-geode-autoconfigure/src/test/java/example/app/model/Author.java b/spring-geode-autoconfigure/src/test/java/example/app/model/Author.java
index b8ca572c..0b5e3475 100644
--- a/spring-geode-autoconfigure/src/test/java/example/app/model/Author.java
+++ b/spring-geode-autoconfigure/src/test/java/example/app/model/Author.java
@@ -41,7 +41,7 @@ public class Author {
 	private Long id;
 
 	@NonNull
-	private String name;
+	private final String name;
 
 	public boolean isNew() {
 		return getId() == null;
diff --git a/spring-geode-autoconfigure/src/test/java/example/app/model/Book.java b/spring-geode-autoconfigure/src/test/java/example/app/model/Book.java
index 29d48f8e..8b998cdb 100644
--- a/spring-geode-autoconfigure/src/test/java/example/app/model/Book.java
+++ b/spring-geode-autoconfigure/src/test/java/example/app/model/Book.java
@@ -17,14 +17,14 @@ package example.app.model;
 
 import java.time.LocalDate;
 
-import lombok.Data;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
-
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.Transient;
 import org.springframework.data.gemfire.mapping.annotation.Region;
 
+import lombok.Data;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+
 /**
  * The {@link Book} class is an Abstract Data Type (ADT) modeling a book.
  *
@@ -49,7 +49,7 @@ public class Book {
 	private LocalDate publishedDate;
 
 	@NonNull
-	private String title;
+	private final String title;
 
 	@Transient
 	public boolean isNew() {
diff --git a/spring-geode-autoconfigure/src/test/java/example/app/model/ISBN.java b/spring-geode-autoconfigure/src/test/java/example/app/model/ISBN.java
index 83196a7a..f89ac918 100644
--- a/spring-geode-autoconfigure/src/test/java/example/app/model/ISBN.java
+++ b/spring-geode-autoconfigure/src/test/java/example/app/model/ISBN.java
@@ -13,7 +13,6 @@
  * or implied. See the License for the specific language governing
  * permissions and limitations under the License.
  */
-
 package example.app.model;
 
 import java.util.UUID;
@@ -48,7 +47,7 @@ public class ISBN implements Comparable<ISBN> {
 	}
 
 	public String getNumber() {
-		return number;
+		return this.number;
 	}
 
 	@Override
diff --git a/spring-geode-samples/boot/actuator/src/main/java/example/app/temp/model/TemperatureReading.java b/spring-geode-samples/boot/actuator/src/main/java/example/app/temp/model/TemperatureReading.java
index 73b826d3..faacc0f4 100644
--- a/spring-geode-samples/boot/actuator/src/main/java/example/app/temp/model/TemperatureReading.java
+++ b/spring-geode-samples/boot/actuator/src/main/java/example/app/temp/model/TemperatureReading.java
@@ -15,14 +15,14 @@
  */
 package example.app.temp.model;
 
-import lombok.Data;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
-
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.Transient;
 import org.springframework.data.gemfire.mapping.annotation.Region;
 
+import lombok.Data;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+
 // tag::class[]
 @Data
 @Region("TemperatureReadings")
@@ -37,7 +37,7 @@ public class TemperatureReading {
 	private Long timestamp = System.currentTimeMillis();
 
 	@NonNull
-	private Integer temperature;
+	private final Integer temperature;
 
 	@Transient
 	public boolean isBoiling() {
@@ -47,11 +47,6 @@ public class TemperatureReading {
 		return temperature != null && temperature >= BOILING_TEMPERATURE;
 	}
 
-	@Transient
-	public boolean isNormal() {
-		return !(isBoiling() || isFreezing());
-	}
-
 	@Transient
 	public boolean isFreezing() {
 
@@ -60,6 +55,11 @@ public class TemperatureReading {
 		return temperature != null && temperature <= FREEZING_TEMPERATURE;
 	}
 
+	@Transient
+	public boolean isNormal() {
+		return !(isBoiling() || isFreezing());
+	}
+
 	@Override
 	public String toString() {
 		return String.format("%d °F", getTemperature());