What is StringUtils.isAnyEmpty in Java?

Overview

isAnyEmpty() is a static method of the StringUtils that accepts a list of strings and checks if any of the strings in the list are empty. The method returns true if at least one of the strings in the given list of strings is considered empty.

How to check if a string is empty

If a string satisfies any of the below criteria, then it’s considered to be empty:

The length of the string is zero or the string is empty.
The string points to a null reference.

How to import `StringUtils`

The definition of StringUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file.

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.12.0</version>
</dependency>

For other versions of the commons-lang package, refer to the Maven Repository.

You can import the StringUtils class as follows:

import org.apache.commons.lang3.StringUtils;

Syntax

public static boolean isAnyEmpty(final CharSequence... css)

Parameters

final CharSequence... cs: the list of character sequences/strings to check.

Return value

This method returns true if any of the strings in the list are empty. Otherwise, it returns false.

Code


import org.apache.commons.lang3.StringUtils;
import java.util.Arrays;
public class Main {
    public static void main(String[] args) {
        String[] strings = {"hi", "educative", "indiana\tjones\n"};
        System.out.printf("The output of StringUtils.isAnyEmpty() for the strings - %s is %s", Arrays.toString(strings), StringUtils.isAnyEmpty(strings));
        System.out.println();
        strings = new String[]{"hi", "educative", "\n\t"};
        System.out.printf("The output of StringUtils.isAnyEmpty() for the strings - %s is %s", Arrays.toString(strings), StringUtils.isAnyEmpty(strings));
        System.out.println();
        strings = new String[]{"", "educative", "hello"};
        System.out.printf("The output of StringUtils.isAnyEmpty() for the strings - %s is %s", Arrays.toString(strings), StringUtils.isAnyEmpty(strings));
        System.out.println();
        strings = new String[]{null, "educative", "hello"};
        System.out.printf("The output of StringUtils.isAnyEmpty() for the strings - %s is %s", Arrays.toString(strings), StringUtils.isAnyEmpty(strings));
        System.out.println();
    }
}

Example 1

strings = ["hi", "educative", "indiana\njones\t"]

The method returns false because none of the strings are empty.

Example 2

strings = ["hi", "educative", "\n\t"]

The method returns false because none of the strings are empty.

Example 3

strings = ["", "educative", "hi"]

The method returns true because one of the strings is empty.

Example 4

strings = [null, "educative", "hello"]

The method returns true because one of the strings points to a null reference considered to be an empty string.

Output

The output of the code will be as follows:

The output of StringUtils.isAnyEmpty() for the strings - [hi, educative, indiana	jones
] is false
The output of StringUtils.isAnyEmpty() for the strings - [hi, educative, 
	] is false
The output of StringUtils.isAnyEmpty() for the strings - [, educative, hello] is true
The output of StringUtils.isAnyEmpty() for the strings - [null, educative, hello] is true