diff --git a/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java b/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java
index b47fee1968..7b98c05684 100644
--- a/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java
+++ b/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java
@@ -12,15 +12,15 @@ public class UUIDPositiveLongGenerator {
         return Math.abs(UUID.randomUUID().getLeastSignificantBits());
     }
 
-    public long getMostSignificantBits(){
+    public long getMostSignificantBits() {
         return Math.abs(UUID.randomUUID().getMostSignificantBits());
     }
 
-    public long gethashCode(){
+    public long gethashCode() {
         return Math.abs(UUID.randomUUID().toString().hashCode());
     }
 
-    public long combineByteBuffer(){
+    public long combineByteBuffer() {
         UUID uuid = UUID.randomUUID();
         ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
         bb.putLong(uuid.getMostSignificantBits());
@@ -29,20 +29,20 @@ public class UUIDPositiveLongGenerator {
         return Math.abs(bb.getLong());
     }
 
-    public long combineBitwise(){
+    public long combineBitwise() {
         UUID uniqueUUID;
         uniqueUUID = UUID.randomUUID();
         return Math.abs((uniqueUUID.getMostSignificantBits() << 32) | (uniqueUUID.getLeastSignificantBits() & 0xFFFFFFFFL));
     }
 
-    public long combineDirect(){
+    public long combineDirect() {
         UUID uniqueUUID = UUID.randomUUID();
         long mostSignificantBits = uniqueUUID.getMostSignificantBits();
         long leastSignificantBits = uniqueUUID.getLeastSignificantBits();
         return Math.abs(mostSignificantBits ^ (leastSignificantBits >> 1));
     }
 
-    public long combinePermutation(){
+    public long combinePermutation() {
         UUID uuid = UUID.randomUUID();
         long mostSigBits = uuid.getMostSignificantBits();
         long leastSigBits = uuid.getLeastSignificantBits();
diff --git a/core-java-modules/core-java-uuid/src/test/java/com/baeldung/uuid/UUIDPositiveLongGeneratorUnitTest.java b/core-java-modules/core-java-uuid/src/test/java/com/baeldung/uuid/UUIDPositiveLongGeneratorUnitTest.java
index ebb061216b..cc377254c4 100644
--- a/core-java-modules/core-java-uuid/src/test/java/com/baeldung/uuid/UUIDPositiveLongGeneratorUnitTest.java
+++ b/core-java-modules/core-java-uuid/src/test/java/com/baeldung/uuid/UUIDPositiveLongGeneratorUnitTest.java
@@ -4,7 +4,6 @@ import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.text.DecimalFormat;
 import java.util.HashSet;
@@ -13,7 +12,7 @@ import java.util.Set;
 import static org.assertj.core.api.Assertions.assertThat;
 
 public class UUIDPositiveLongGeneratorUnitTest {
-    private final static int n = 1000000;
+    private final static int N = 1000000;
     private final static double COLLISION_THRESHOLD = 0.001;
     private final UUIDPositiveLongGenerator uuidLongGenerator = new UUIDPositiveLongGenerator();
     private final Logger logger = LoggerFactory.getLogger(UUIDPositiveLongGeneratorUnitTest.class);
@@ -41,14 +40,14 @@ public class UUIDPositiveLongGeneratorUnitTest {
     private void collisionCheck(Method method) throws Exception {
         Set<Long> uniqueValues = new HashSet<>();
         int collisions = 0;
-        for (int i = 0; i < n; i++) {
+        for (int i = 0; i < N; i++) {
             long uniqueValue = (long) method.invoke(uuidLongGenerator);
             assertThat(uniqueValue).isPositive();
             if (!uniqueValues.add(uniqueValue)) {
                 collisions++;
             }
         }
-        double collisionsProbability = (double) collisions / n;
+        double collisionsProbability = (double) collisions / N;
         printOutput(method.getName(), collisions, collisionsProbability);
         assertThat(collisionsProbability).isLessThan(COLLISION_THRESHOLD);
     }