https://stackoverflow.com › questions › 14721397

StringUtils.isEmpty(String str) - Checks if a String is empty ("") or null. or StringUtils.isBlank(String str) - Checks if a String is whitespace, empty ("") or null.

https://www.w3schools.com › java › ref_string_isempty.asp

The isEmpty() method checks whether a string is empty or not. This method returns true if the string is empty (length() is 0), and false if not.

https://www.baeldung.com › java-blank-empty-strings

Learn how to use native Java methods, regular expressions, and libraries to check if a string is empty or blank. See examples, definitions, and performance tips for different approaches.

https://stackabuse.com › java-check-if-string-is-null-empty-or-blank

In this tutorial, we'll take a look at how to check if a String is null, empty or blank in Java, using String.isEmpty(), String.equals() and Apache Commons, with examples.

https://www.baeldung.com › java-string-isempty-vs-isblank

Simply put, the isEmpty () method returns true if the String is empty. Otherwise, it returns false. Internally, isEmpty () relies on the length of the byte array that represents the text of a String object. Moreover, the isEmpty () method counts any type of character to calculate if a text is empty or not.

https://www.w3docs.com › snippets › java › checking-if-a-string-is-empty-or-null-in-java.html

To check if a string is empty or null in Java, you can use the isEmpty() method of the java.lang.String class, which returns true if the string is empty, and false if it is not. Here is an example of how you can use isEmpty() to check if a string is empty: import java.util.Scanner; public class StringEmptyExample {

https://codegym.cc › groups › posts › java-check-if-string-is-null-empty-or-blank

In Java, a built-in method is available to check if a String is empty before performing any operations. If you don’t want to use this available method, alternatively you can check if the length of the String is zero. It will do the job for you. For the sake of this example, we are using the built-in method to see if the string is empty.

https://www.programiz.com › java-programming › examples › string-empty-null

In this program, you'll learn to check if a string is empty or null using a method and the if-else statement in Java.

https://howtodoinjava.com › java11 › check-blank-string

The isBlank() method has been added in Java 11. To check if a given string does not have even blank spaces, use String.isEmpty() method. 1. String isBlank() API. It returns true if the given string is empty or contains only white space code points, otherwise false. It uses Character.isWhitespace(char) method to determine a white ...

https://www.geeksforgeeks.org › java-string-isempty-method-example

The isEmpty() method of Java AbstractCollection is used to check and verify if a Collection is empty or not. It returns True if the Collection is empty else it returns False. Syntax: AbstractCollection.isEmpty() Parameters: The method does not take any parameter. Return Value: The function returns True if the collection is empty else ...