java.lang does not contain a class called StringUtils. Several third-party libs do, such as Apache Commons Lang or the Spring framework. Make sure you have the relevant jar in your project classpath and import the correct class.

Answer from Jonik on Stack Overflow
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Apache Commons
commons.apache.org › proper › commons-lang › jacoco › org.apache.commons.lang3 › StringUtils.java.html
StringUtils.java
* @return the passed in String, or the empty String if it was {@code null}. * @see Objects#toString(Object, String) * @see String#valueOf(Object) */ public static String defaultString(final String str) { return Objects.toString(str, EMPTY); } /** * Returns either the given String, or if the String is {@code null}, {@code nullDefault}. * * <pre> * StringUtils.defaultString(null, "NULL") = "NULL" * StringUtils.defaultString("", "NULL") = "" * StringUtils.defaultString("bat", "NULL") = "bat" * </pre> * <p> * Since this is now provided by Java, instead call {@link Objects#toString(Object, String)}: * </p> * * <pre> * Objects.toString(null, "NULL") = "NULL" * Objects.toString("", "NULL") = "" * Objects.toString("bat", "NULL") = "bat" * </pre> * * @param str the String to check, may be null.
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GeeksforGeeks
geeksforgeeks.org › java › string-handling-with-apache-commons-stringutils-class-in-java
String Handling with Apache Commons' StringUtils Class in Java - GeeksforGeeks
April 28, 2025 - Is the string empty? false Is the string blank? false The trimmed string is: hello world The substring is: llo w The replaced string is: hello Java The words in the string are: hello world The joined string is: apple, banana, orange The capitalized string is: Hello world Are the strings equal? true · Note: You'll need to have the Apache Commons Lang library added to your project's classpath in order for this program to compile and run successfully. ... import org.apache.commons.lang3.StringUtils; public class StringUtilsExample { public static void main(String[] args) { String str1 = "Hello";
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Educative
educative.io › answers › what-is-stringutilsright-in-java
What is StringUtils.right() in Java?
You can import the StringUtils class as follows. ... This method returns the rightmost characters of the string. The code below shows how the right() method works in Java.
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Apache Commons
commons.apache.org › proper › commons-lang › apidocs › org › apache › commons › lang3 › StringUtils.html
StringUtils (Apache Commons Lang 3.20.0 API)
StringUtils instances should NOT be constructed in standard programming. Instead, the class should be used as StringUtils.trim(" foo ");. This constructor is public to permit tools that require a JavaBean instance to operate.
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Spring
docs.spring.io › spring-framework › docs › current › javadoc-api › org › springframework › util › StringUtils.html
StringUtils (Spring Framework 7.0.5 API)
This class delivers some simple functionality that should really be provided by the core Java String and StringBuilder classes. It also provides easy-to-use methods to convert between delimited strings, such as CSV strings, and collections and arrays. Since: 16 April 2001 · Author: Rod Johnson, Juergen Hoeller, Keith Donald, Rob Harrop, Rick Evans, Arjen Poutsma, Sam Brannen, Brian Clozel, Sebastien Deleuze · Constructors · Constructor · Description · StringUtils() All MethodsStatic MethodsConcrete MethodsDeprecated Methods ·
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Medium
medium.com › @vino7tech › useful-stringutils-methods-in-java-833dc5236f0a
Useful StringUtils Methods in Java | by Vinotech | Medium
September 29, 2024 - Here is a list of commonly used methods from Spring Framework’s StringUtils class (org.springframework.util.StringUtils), which provides utility methods to work with String objects, specifically tailored to Spring-related use cases:
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JavaBeat
javabeat.net › home › how to use stringutils class in java
How to Use StringUtils Class in Java
March 8, 2024 - To Use the StringUtils class in Java, first, add its corresponding Apache Commons dependency in a “pom.xml” file of your maven project. After this, you can import the StringUtils class in your Java application and use any of its methods ...
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O'Reilly
oreilly.com › library › view › jakarta-commons-cookbook › 059600706X › ch02s02.html
2.1. Setting Up StringUtils and WordUtils - Jakarta Commons Cookbook [Book]
November 16, 2004 - import org.apache.commons.lang.StringUtils; import org.apache.commons.lang.WordUtils;
Author   Timothy M. O'Brien
Published   2004
Pages   400
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Delft Stack
delftstack.com › home › howto › java › stringutils in java
How to StringUtils in Java | Delft Stack
February 2, 2024 - In this example, we used some standard methods of the StringUtils class to understand how the class works with the String. This class is similar to the String class in Java except that it provides more utility methods to work with String. See the example below. import org.apache.commons.lang3.StringUtils; public class SimpleTesting { public static void main(String[] args) { // Get abbreviation of string String val = StringUtils.abbreviate("Delft", 4); System.out.println(val); // Capitalize string val = StringUtils.capitalize("delft"); System.out.println(val); // Chop string val = StringUtils.c
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Know Program
knowprogram.com › home › import stringutils in java
Import StringUtils in Java - Know Program
September 14, 2022 - If you are working with a Maven project then you can simply add the dependency for it in the pom.xml file or if you are working with a simple normal Java project then you can download the jar file and add it into the project classpath. If you are working with the Maven project then to use StringUtils class we can use Maven Dependency.
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Stack Abuse
stackabuse.com › guide-to-apache-commons-stringutils-class-in-java
Guide to Apache Commons' StringUtils Class in Java
September 27, 2023 - If you're using Maven, import the latest dependency to your pom.xml file: <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.11</version> </dependency> ... With the commons-lang3 dependency in our project, we can move on to discussing some of the most used methods from StringUtils.
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Medium
medium.com › @nagarjun_nagesh › java-apache-commons-stringutils-33c6d779dabe
[Java] Apache Commons StringUtils | by Nagarjun (Arjun) Nagesh | Medium
July 10, 2024 - Apache Commons Lang is a popular library that provides a host of helper utilities for the Java standard library. The StringUtils class is particularly useful for string manipulation, offering methods for handling null inputs, whitespace, capitalization, abbreviations, and more.
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Quora
quora.com › How-come-I-cant-import-org-apache-commons-lang-StringUtils
How come I can't import org.apache.commons.lang.StringUtils? - Quora
Answer: Have you double-checked the path the Jar file is located in, and have you relocated the project at some stage? For demo purposes, I'll download it and put it in a mock NetBeans project... 1. Download the needed Jar file from Download Apache Commons Lang 2. Locate the downloaded archive, ...
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GitHub
github.com › apache › maven-shared-utils › blob › master › src › main › java › org › apache › maven › shared › utils › StringUtils.java
maven-shared-utils/src/main/java/org/apache/maven/shared/utils/StringUtils.java at master · apache/maven-shared-utils
import java.util.StringTokenizer; · import org.jspecify.annotations.NonNull; import org.jspecify.annotations.Nullable; · /** * <p>Common <code>String</code> manipulation routines.</p> * * <p>Originally from · * <a href="http://jakarta.apache.org/turbine/">Turbine</a>, the · * GenerationJavaCore library and Velocity. * Later a lot of methods from commons-lang StringUtils ·
Author   apache
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Kodejava
kodejava.org › tag › stringutils
StringUtils - Learn Java by Examples
package org.kodejava.lang; import org.apache.commons.lang3.StringUtils; import java.time.LocalDate; import java.time.Month; import java.time.temporal.ChronoUnit; public class StringAlignment { private static final Object[][] people = { {"Alice", LocalDate.of(2000, Month.JANUARY, 1)}, {"Bob", LocalDate.of(1989, Month.DECEMBER, 15)}, {"Carol", LocalDate.of(1992, Month.JULY, 24)}, {"Ted", LocalDate.of(2006, Month.MARCH, 13)}, }; public static void main(String[] args) { String nameFormat = "| %1$-20s | "; String dateFormat = " %2$tb %2$td, %2$tY | "; String ageFormat = " %3$3s |%n"; String format
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Oracle
docs.oracle.com › cd › E55783_02 › Platform.11-2 › apidoc › atg › core › util › StringUtils.html
StringUtils (ATG Java API)
java.lang.Object · atg.core.util.StringUtils · public class StringUtils extends java.lang.Object · This class contains static methods for performing various operations on Strings.
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GitHub
github.com › apache › commons-lang › blob › master › src › main › java › org › apache › commons › lang3 › StringUtils.java
commons-lang/src/main/java/org/apache/commons/lang3/StringUtils.java at master · apache/commons-lang
* StringUtils.getFuzzyDistance("Apache Software Foundation", "asf", Locale.ENGLISH) = 3 ... * @param locale This string matching logic is case-insensitive. A locale is necessary to normalize both Strings to lower case. ... * @throws IllegalArgumentException if either String input {@code null} or Locale input {@code null}. ... * <a href="https://commons.apache.org/proper/commons-text/javadocs/api-release/org/apache/commons/text/similarity/FuzzyScore.html">
Author   apache