Use org.apache.commons.lang.StringUtils.EMPTY
Baeldung
baeldung.com › home › java › java string › difference between string isempty() and isblank()
Difference Between String isEmpty() and isBlank() | Baeldung
December 2, 2025 - Working with Strings in Java is sometimes confusing because we have many ways to do similar things. In this article, we’ll look at how to validate blank and empty Strings using the isEmpty() and isBlank() methods. Although similar, the two methods are not the same.
iO Flood
ioflood.com › blog › empty-string-java
Working with Java Empty String: A Detailed Guide
February 20, 2024 - An empty string is a string with no characters, while a null string is a string variable that has not been given a value. This distinction is crucial when dealing with string operations in Java.
Why is there no String.Empty in Java? - Stack Overflow
I understand that every time I type the string literal "", the same String object is referenced in the string pool. But why doesn't the String API include a public static final String Empty = "";,... More on stackoverflow.com
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
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September 26, 2022[java] String.split on tab is not registering empty strings with tabs in between
It seems to work for me: Arrays.toString("a\t\t\td".split("\t")) ===> [a, , , d] If I understand what you're saying, I shouldn't be getting more than two results here, but I am. More on reddit.com
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May 9, 2016Can not enter empty string input in console java IntelliJ
Google How to remove a carriage return from a string you may want to trim and replaceAll More on reddit.com
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December 5, 2019Videos
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JAVA String Validation: NULL , EMPTY and BLANK - YouTube
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Tutorialspoint
tutorialspoint.com › home › java/lang › java string isempty method
Java String isEmpty Method
September 1, 2008 - The Java String isEmpty() method is used to check whether the current string is empty or not. The method returns a boolean value which is true if and only if the string is empty; false otherwise.
W3Schools
w3schools.com › java › ref_string_isempty.asp
Java String isEmpty() Method
String myStr1 = "Hello"; String myStr2 = ""; System.out.println(myStr1.isEmpty()); System.out.println(myStr2.isEmpty()); ... The isEmpty() method checks whether a string is empty or not.
BeginnersBook
beginnersbook.com › 2017 › 10 › java-string-isempty-method-with-example
Java String isEmpty() method
Java String isEmpty() method checks whether a String is empty or not. This method returns true if the given string is empty, else it returns false.
Top answer 1 of 12
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Use org.apache.commons.lang.StringUtils.EMPTY
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String.EMPTY is 12 characters, and "" is two, and they would both be referencing exactly the same instance in memory at runtime. I'm not entirely sure why String.EMPTY would save on compile time, in fact I think it would be the latter.
Especially considering Strings are immutable, it's not like you can first get an empty String, and perform some operations on it - best to use a StringBuilder (or StringBuffer if you want to be thread-safe) and turn that into a String.
Update
From your comment to the question:
What inspired this is actually
TextBox.setText("");
I believe it would be totally legitimate to provide a constant in your appropriate class:
private static final String EMPTY_STRING = "";
And then reference it as in your code as
TextBox.setText(EMPTY_STRING);
As this way at least you are explicit that you want an empty String, rather than you forgot to fill in the String in your IDE or something similar.
Blogger
javarevisited.blogspot.com › 2016 › 01 › how-to-check-if-string-is-not-null-and-empty-in-java-example.html
How to check if String is not null and empty in Java? Example
In Java, since null and empty are ... points to null if it has not been initialized and an empty String is a String without any character or a string of zero length....
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 - If we’re at least on Java 6, then the simplest way to check for an empty string is String#isEmpty:
Programiz
programiz.com › java-programming › examples › string-empty-null
Java Program to Check if a String is Empty or Null
Now, if we want the program to consider strings with white spaces as empty strings, we can use the trim() method. The method removes all the white spaces present in a string. class Main { public static void main(String[] args) { // create a string with white spaces String str = " "; // check ...
GeeksforGeeks
geeksforgeeks.org › java › java-string-isempty-method-example
Java String isEmpty() Method with Example - GeeksforGeeks
November 20, 2024 - In Java, the String isEmpty() method checks if a string is empty (length is zero). This method returns true if the string is empty and false otherwise.
LinkedIn
linkedin.com › pulse › how-check-string-empty-using-isempty-method-java-kapil-sharma-y48ce
How to check if a string is empty using the isEmpty ...
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Vultr Docs
docs.vultr.com › java › standard-library › java › lang › String › isEmpty
Java String isEmpty() - Check If Empty | Vultr Docs
December 17, 2024 - The isEmpty() method in Java is a straightforward and efficient way for checking whether a given string has a length of zero, which means it is an empty string. This method is part of the String class in Java's standard library, making it readily ...
Oracle
docs.oracle.com › javase › 8 › docs › api › java › lang › String.html
String (Java Platform SE 8 )
October 20, 2025 - Returns a string that is a substring of this string. The substring begins with the character at the specified index and extends to the end of this string. ... "unhappy".substring(2) returns "happy" "Harbison".substring(3) returns "bison" "emptiness".substring(9) returns "" (an empty string)
Oracle
docs.oracle.com › javaee › 7 › tutorial › bean-validation002.htm
21.2 Validating Null and Empty Strings - Java Platform, Enterprise Edition: The Java EE Tutorial (Release 7)
The Java programming language distinguishes between null and empty strings. An empty string is a string instance of zero length, whereas a null string has no value at all.
Wikipedia
en.wikipedia.org › wiki › Empty_string
Empty string - Wikipedia
January 16, 2026 - Even a string of length zero can require memory to store it, depending on the format being used. In most programming languages, the empty string is distinct from a null reference (or null pointer) because a null reference points to no string at all, not even the empty string.
Medium
medium.com › @AlexanderObregon › javas-string-isblank-method-explained-be7064a144a7
Java’s String.isBlank() Method Explained | Medium
January 10, 2025 - It provides a quick and effective way to handle empty or whitespace-only strings. Below are some practical applications: When receiving user input, particularly from forms or text fields, it’s important to handle cases where the input might be empty or consist only of whitespace. Using isBlank() makes such checks more concise and avoids potential errors. ... import java.util.Scanner; public class InputValidation { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("Enter your username: "); String input = scanner.nextLine(); if (input.isBlank()) { System.out.println("Username cannot be empty or just spaces."); } else { System.out.println("Welcome, " + input + "!"); } } }
Medium
medium.com › @ecetasci.iu › checking-for-null-or-empty-strings-in-java-19518fa1e553
Checking for Null or Empty Strings in Java | by Ece Tasci | Medium
February 25, 2025 - To prevent this, it is crucial to check for null before performing operations on a variable. An empty String ("") has zero characters but still exists in memory, specifically in the heap where Java stores objects.
Coderanch
coderanch.com › t › 203109 › java › Efficient-Check-Empty-String
Efficient Way to Check Empty String (Performance forum at Coderanch)
June 11, 2008 - We use (string != null || string.trim().length() == 0) to check if string is empty. Calling a method which actually iterate through string and checks for non-whitespace character .
Reddit
reddit.com › r/askprogramming › in java, should i use (string ) isempty() or isblank() when checking an xml object for an empty value?
r/AskProgramming on Reddit: In Java, should I use (String ) isEmpty() or isBlank() when checking an XML object for an empty value?
September 26, 2022 -
I have some config file and it is deployed in many regions. Some regions have certain requirements for example lets say one region needed a username and password (basic auth). The current setup is that each deployment has it's own config file and only the instances where it is needed are these values included in the respective config.xml file.
So I have in my Java code some logic that says
'if this element is in the XML, set the corresponding variable with its value, if not do nothing'
So when I'm trying to see if that value is present or if the tag is empty/blank, which String utility should I use to check?
example code (default option left open as empty string):
if (my_config.getString(USER_ID_ELEMENT, "") != null
& my_config.getString(PASSWORD_ELEMENT, "") != null) {
my_userId = m_config.getString(USER_ID_ELEMENT, "");
my_password = m_config.getString(PASSWORD_ELEMENT, "");Here I'm checking if it is not null, but I don't think it's a very good test since I don't know if an empty XML tag is blank or is empty (i think null isn't even an option)?
Top answer 1 of 2
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What behavior do you want if the xml parser emits " " as the config value?
2 of 2
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Blank and empty are not the same thing. Empty means "" and only "". Blank means "", " ", " ", and so on. Which you use depends on your use case, but usually its safest to go with isBlank combined with a null check.
Coderanch
coderanch.com › t › 375744 › java › representing-empty-string
better way of representing an empty string... (Java in General forum at Coderanch)
January 28, 2005 - programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums · this forum made possible by our volunteer staff, including ... ... Hi, Just wanted to know if there is any difference between the following usage of an empty string 1) String empty = ""; 2) String empty = SomeInterface.emptyString; Now, in SomeInterface interface...