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Is StringUtils.EMPTY recommended? [closed]

stackoverflow.com › questions › 4095501 › is-stringutils-empty-recommended

Of course not. Do you really think "" is not clear enough ?

Constants have essentially 3 use cases:

Document the meaning of a value (with constant name + javadoc)
Synchronize clients on a common value.
Provide a shortcut to a special value to avoid some init costs

None apply here.

Answer from David Pierre on Stack Overflow

reddit.com › r/javahelp › check if a string is empty - print "unknown" then

r/javahelp on Reddit: check if a string is empty - print "unknown" then

February 10, 2019 -

public String getNameTierart() {
return nameTierart;
}

// Tiere deklarieren und initalisieren
   Affe affe = new Affe();
affe.setNameTierart("Affe");

So if affe.setNameTier("") for example the program should insert "unknown" automatically .

So I guess

check if string is empty if so print unknown

else print value

is there a check empty command?

thanks in advance.

Top answer

1 of 5

You could literally read the String API online.

2 of 5

Yes, use the isEmpty() method.

HowDev

how.dev › answers › what-is-stringutilstrimtoempty-in-java

What is StringUtils.trimToEmpty() in Java?

the methods in Java that can be ... remove control characters from both ends of the input string. The method returns an empty string if the input string is null....

Discussions

java - Is StringUtils.EMPTY recommended? - Stack Overflow

But how often have you specifically seen a non-empty empty-looking String constant? 2018-07-28T01:25:42.013Z+00:00 ... This is what Unit Tests exist for. They must eliminate any such typos / anomalies at early stage helping to avoid any unexpected behavior. 2021-08-10T14:50:26.33Z+00:00 ... I will add my two cents here because I don't see anybody talking about String interning and Class initialization: All String literals in Java sources are interned, making any "" and StringUtils... More on stackoverflow.com

stackoverflow.com

How To Create an Empty String

First doesn't even create an empty string More on reddit.com

r/ProgrammerHumor

538

October 22, 2019

In Java, should I use (String ) isEmpty() or isBlank() when checking an XML object for an empty value?

What behavior do you want if the xml parser emits " " as the config value? More on reddit.com

r/AskProgramming

September 26, 2022

Shorter (efficient) way to check if a string is null or empty?

[The Java String class has an isEmpty method]( https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#isEmpty() More on reddit.com

r/learnjava

February 29, 2020

Medium

medium.com › @SinghTarandeep › what-is-difference-between-stringutils-isempty-and-stringutils-isnotempty-14909cdbd395

What is difference between StringUtils.isEmpty and ...

May 12, 2017 - If you use StringUtils.isEmpty(str) , it will return true

Educative

educative.io › answers › what-is-stringutilsisnoneempty-in-java

What is StringUtils.isNoneEmpty in Java?

the methods in Java that can be called without creating an object of the class. method of the StringUtils that accepts a list of strings and checks if any of the strings in the list are empty.

Medium

medium.com › @bectorhimanshu › avoiding-nullpointerexception-using-null-safe-libraries-in-java-81cb414a978d

Avoiding NullPointerException using null-safe libraries in Java | by bectorhimanshu | Medium

September 29, 2023 - System.out.println(“Is str2 null or empty: “ + StringUtils.isEmpty(str2)); // true

Stack Overflow

stackoverflow.com › questions › 4095501 › is-stringutils-empty-recommended

java - Is StringUtils.EMPTY recommended? - Stack Overflow

Top answer

1 of 12

145

Of course not. Do you really think "" is not clear enough ?

Constants have essentially 3 use cases:

Document the meaning of a value (with constant name + javadoc)
Synchronize clients on a common value.
Provide a shortcut to a special value to avoid some init costs

None apply here.

2 of 12

I use StringUtils.EMPTY, for hiding the literal and also to express that return StringUtils.EMPTY was fully expected and there should return an empty string, "" can lead to the assumption that "" can be easily changed into something else and that this was maybe only a mistake. I think the EMPTY is more expressive.

Educative

educative.io › answers › what-is-stringutilsisempty-in-java

What is StringUtils.isEmpty in Java?

isEmpty() is a static method of the StringUtils class that is used to check if a given string is empty or not.

Apache Commons

commons.apache.org › proper › commons-lang › apidocs › org › apache › commons › lang3 › StringUtils.html

StringUtils (Apache Commons Lang 3.20.0 API)

Returns either the passed in String, or if the String is null, an empty String (""). StringUtils.defaultString(null) = "" StringUtils.defaultString("") = "" StringUtils.defaultString("bat") = "bat" ... Deprecated. Use Objects.toString(Object, String). Returns either the given String, or if ...

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Buggybread

buggybread.com › 2014 › 02 › java-difference-between.html

Java - Difference between StringUtils.EMPTY and ...

StringUtils.EMPTY is a final static member of StringUtil class that equates to "" i.e empty String.

Apache Commons

commons.apache.org › proper › commons-lang › javadocs › api-3.1 › index.html

StringUtils (Commons Lang 3.1 API)

Commons Lang 3.1 API · Frame Alert · This document is designed to be viewed using the frames feature. If you see this message, you are using a non-frame-capable web client. Link toNon-frame version

Baeldung

baeldung.com › home › java › java string › checking for empty or blank strings in java

Checking for Empty or Blank Strings in Java | Baeldung

January 8, 2024 - It checks whether a given string is null or empty, but it won’t check for whitespace-only strings. Furthermore, the Spring Core library provided a class named StringUtils which has a method to check if a string is empty. However, the class was deprecated in the Spring 5.3.0 version and above.

Medium

medium.com › dev-java › stringutils-isnotempty-vs-stringutils-isnotblank-in-java-491f10680879

Java String Checks: Understanding isNotEmpty vs isNotBlank | by Anil R | Dev Java | Medium

April 23, 2025 - When working with strings in Java, it’s common to perform checks to see whether a string is not empty or not blank. Apache Commons Lang provides two very useful utility methods for this: StringUtils.isNotEmpty() and StringUtils.isNotBlank(). Press enter or click to view image in full size ·

Quora

quora.com › In-Java-is-there-any-advantage-of-initialing-a-string-using-StringUtils-EMPTY-vs-null

In Java, is there any advantage of initialing a string using StringUtils.EMPTY vs null? - Quora

Answer (1 of 3): String canonicalization using predefined constants such as StringUtils.EMPTY is an attempt, in this case, to save program memory by reducing duplicate strings. There is some value in reducing the memory footprint and Java has ...

OpenRewrite

docs.openrewrite.org › recipe catalog › apache › commons › commons lang › replace any stringutils#isempty(string) and #isnotempty(string)

Replace any StringUtils#isEmpty(String) and #isNotEmpty ...

java · Diff · import org.apache.commons.lang3.StringUtils; class A { boolean test(String first) { return StringUtils.isEmpty(first); } } class A { boolean test(String first) { return first == null || first.isEmpty(); } } @@ -1,2 +1,0 @@ -import org.apache.commons.lang3.StringUtils; - class A { @@ -5,1 +3,1 @@ class A { boolean test(String first) { - return StringUtils.isEmpty(first); + return first == null || first.isEmpty(); } This recipe has no required configuration options.

Published 1 week ago

GeeksforGeeks

geeksforgeeks.org › java › java-stringutils-isnoneblank-method

Java StringUtils.isNoneBlank() Method with Examples - GeeksforGeeks

October 24, 2023 - The Returns are true if none of the provided strings are blank or empty. Otherwise, it returns false. ... // Java Program to demonstrate // StringUtils.isNoneBlank() method import java.io.*; import org.apache.commons.lang3.StringUtils; // Driver ...

Spring

docs.spring.io › spring-framework › docs › current › javadoc-api › org › springframework › util › StringUtils.html

StringUtils (Spring Framework 7.0.5 API)

Extract the filename extension from the given Java resource path. ... the extracted filename extension (potentially an empty string), or null if the provided path is null or does not contain a dot (".")

iO Flood

ioflood.com › blog › stringutils-isempty

StringUtils.isEmpty() in Java: Your Method Guide

March 27, 2024 - It returns true if the string is either null or empty, and false otherwise. StringUtils.isEmpty plays a crucial role in string manipulation tasks in Java applications.

Stack Overflow

stackoverflow.com › q › 24411477

java - Is using StringUtils.EMPTY recommended in unit test ...