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.baeldung.com › java-blank-empty-strings

Both String#isEmpty and String#length can be used to check for empty strings. If we also want to detect blank strings, we can achieve this with the help of String#trim. It’ll remove all leading and trailing whitespaces before performing the check: boolean isBlankString(String string) {.

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://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://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.

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

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 space character. /**

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

Java.lang.String.isEmpty () String method checks whether a String is empty or not. This method returns true if the given string is empty, else it returns false. The isEmpty () method of the String class is included in Java string since JDK 1.6.

https://www.techiedelight.com › check-string-empty-or-null-java

From Java 7 onward, the recommended approach is to use the String.isEmpty() method to check for an empty string in Java. To avoid NullPointerException if the string is null, a null check should precede the method call.