https://stackoverflow.com › questions › 154059
How do I check for an empty/undefined/null string in JavaScript?Empty string (only!) To check for exactly an empty string, compare for strict equality against "" using the === operator: if (strValue === "") { // strValue was empty string } To check for not an empty string strictly, use the !== operator: if (strValue !== "") { // strValue was not an empty string }
https://www.baeldung.com › java-blank-empty-strings
Checking for Empty or Blank Strings in Java - BaeldungThere are several ways to check whether a string is empty or not. Often, we also want to check if a string is blank, meaning that it consists of only whitespace characters. The most convenient way is to use Apache Commons Lang, which provides helpers such as StringUtils.isBlank.
https://stackoverflow.com › questions › 14721397
Checking if a string is empty or null in Java - Stack OverflowYou can leverage Apache Commons StringUtils.isEmpty(str), which checks for empty strings and handles null gracefully. Example: System.out.println(StringUtils.isEmpty("")); // true System.out.println(StringUtils.isEmpty(null)); // true
https://www.freecodecamp.org › news › javascript-check-empty-string-checking-null-or-empty...
JavaScript Check Empty String – Checking Null or Empty in JSHow to Check for a Null or Empty String in JavaScript. At this point we have learned how to check for an empty string and also if a variable is set is null. Let’s now check to for both this way: let myStr = null; if (myStr === null || myStr.trim() === "") { console.log("This is an empty string!"); } else { console.log("This is not an empty ...
https://www.freecodecamp.org › news › check-if-string-is-empty-or-null-javascript
How to Check if a String is Empty or Null in JavaScript – JS TutorialOne way to check for an empty or null string is to use the if statement and the typeof operator. Here's an example: let str = ""; if (typeof str === "string" && str.length === 0) { . console.log("The string is empty"); } else if (str === null) { . console.log("The string is null"); } else { . console.log("The string is not empty or null"); }
https://bobbyhadz.com › blog › javascript-check-if-string-is-empty
How to check if a String is Empty in JavaScript | bobbyhadz# Check if a String is Empty in JavaScript. Use the length property on the string to check if it is empty. If the string's length is equal to 0, then it's empty, otherwise, it isn't empty.
https://www.squash.io › how-to-check-for-an-empty-string-in-javascript
How To Check For An Empty String In Javascript - squash.ioLearn how to check for an empty string in JavaScript using simple techniques. Find out if a string is undefined, null, or empty.
https://stackabuse.com › java-check-if-string-is-null-empty-or-blank
Java: Check if String is Null, Empty or Blank - Stack AbuseIn 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.w3schools.com › java › ref_string_isempty.asp
Java String isEmpty() Method - W3SchoolsThe 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://howtodoinjava.com › java11 › check-blank-string
Java String isBlank() – Check Blank or Empty String - HowToDoInJavaTo 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.
