"isBlank() vs. isEmpty() – Which One Should You Choose?"

Introduction

If you are a Java developer, then definitely you have used String class and its methods in your career. But some of you might have also used one of the isBlank or isEmpty methods and some of you always get confused about choosing one of them.

So Let's talk about what this method is actually about and when we should use one of them. In this blog, I will make sure that you will understand isBlank() and isEmpty() Simply.

Let's Understand isBlank() vs isEmpty().

1. isBlank() :

In Java, isBlank() is a method introduced in the String class as part of Java 11. It is used to check if a string is empty or contains only white spaces or escape sequence characters.

1. isBlank() returns true if your string is empty.

2. isBlank() returns true if the string contains whitespaces

3. isBlank() returns true if it contains escape sequence characters only.

4. isBlank() returns false if the length of the string is not zero

Here is an example of understanding isBlank() in a simple way:

2. isEmpty() :

In Java, the isEmpty() method is also a method in the String class. It's used to check whether a string is empty or not. A string is considered empty if its length is 0, meaning it contains no characters.

1. isEmpty() returns true if the length of the string is zero

2. isEmpty() returns false if the length of the string is not zero

Here is an example of understanding isEmpty() in a simple way :

Summary :

In Summary, isBlank() and isEmpty() are the methods of string class and both are used to check the content of the string. isBlank() is more useful than isEmpty() because it checks whether a string is empty or not by checking whether a string contains whitespaces only or escape sequence characters. It checks whether a string is empty by checking the length of the string.

isBlank() returns true if the length of the string is zero or it contains whitespaces only or escape sequence characters.