diff --git a/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java b/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java
index 9bf10e22cf..858e90abe4 100644
--- a/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java
+++ b/core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/trim/LTrimRTrim.java
@@ -3,6 +3,7 @@ package com.baeldung.trim;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 
+import org.apache.commons.lang3.StringUtils;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;
 import org.openjdk.jmh.annotations.Fork;
@@ -34,7 +35,7 @@ public class LTrimRTrim {
     }
 
     @Setup
-    public void setup() {
+    private void setup() {
         src = "       White spaces left and right          ";
         ltrimResult = "White spaces left and right          ";
         rtrimResult = "       White spaces left and right";
@@ -67,7 +68,7 @@ public class LTrimRTrim {
 
     // Going through the String detecting Whitespaces
     @Benchmark
-    public boolean whileCharacters() {
+    private boolean whileCharacters() {
         String ltrim = whileLtrim(src);
         String rtrim = whileRtrim(src);
 
@@ -76,7 +77,7 @@ public class LTrimRTrim {
 
     // replaceAll() and Regular Expressions
     @Benchmark
-    public boolean replaceAllRegularExpression() {
+    private boolean replaceAllRegularExpression() {
         String ltrim = src.replaceAll("^\\s+", "");
         String rtrim = src.replaceAll("\\s+$", "");
 
@@ -95,7 +96,7 @@ public class LTrimRTrim {
 
     // Pattern matches() with replaceAll
     @Benchmark
-    public boolean patternMatchesLTtrimRTrim() {
+    private boolean patternMatchesLTtrimRTrim() {
         String ltrim = patternLtrim(src);
         String rtrim = patternRtrim(src);
 
@@ -104,7 +105,7 @@ public class LTrimRTrim {
 
     // Guava CharMatcher trimLeadingFrom / trimTrailingFrom
     @Benchmark
-    public boolean guavaCharMatcher() {
+    private boolean guavaCharMatcher() {
         String ltrim = CharMatcher.whitespace().trimLeadingFrom(src);
         String rtrim = CharMatcher.whitespace().trimTrailingFrom(src);
 
@@ -113,9 +114,9 @@ public class LTrimRTrim {
 
     // Apache Commons StringUtils containsIgnoreCase
     @Benchmark
-    public boolean apacheCommonsStringUtils() {
-        String ltrim = org.apache.commons.lang3.StringUtils.stripStart(src, null);
-        String rtrim = org.apache.commons.lang3.StringUtils.stripEnd(src, null);
+    private boolean apacheCommonsStringUtils() {
+        String ltrim = StringUtils.stripStart(src, null);
+        String rtrim = StringUtils.stripEnd(src, null);
 
         return checkStrings(ltrim, rtrim);
     }
diff --git a/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java b/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java
index 3d8f8b382b..78bf01e540 100644
--- a/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java
+++ b/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/trim/LTrimRTrimUnitTest.java
@@ -67,8 +67,8 @@ public class LTrimRTrimUnitTest {
     @Test
     public void givenString_whenCallingStringUtilsStripStartEnd_thenReturnsTrue() {
         // Use StringUtils containsIgnoreCase to avoid case insensitive issues
-        String ltrim = org.apache.commons.lang3.StringUtils.stripStart(src, null);
-        String rtrim = org.apache.commons.lang3.StringUtils.stripEnd(src, null);
+        String ltrim = StringUtils.stripStart(src, null);
+        String rtrim = StringUtils.stripEnd(src, null);
 
         // Compare the Strings obtained and the expected
         Assert.assertTrue(ltrimResult.equalsIgnoreCase(ltrim));