What is the RandomUtils.nextBoolean() in Java?

The nextBoolean() static method of the RandomUtils class in Java will return a random boolean value.

Import RandomUtils

RandomUtils is defined in the Apache Commons Lang package. Apache Commons Lang can be added 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.

Syntax

The syntax of the nextBoolean() method is as follows:

public static boolean nextBoolean()

Argument

The nextBoolean() method doesn’t take any argument.

Return value

This method randomly returns either true or false.

Code

In the code below, we have used the nextBoolean() method as follows:

import org.apache.commons.lang3.RandomUtils;
class NextBooleanExample {
    public static void main( String args[] ) {
        System.out.println("RandomUtils.nextBoolean() => " + RandomUtils.nextBoolean()); // the random boolean
        System.out.println("RandomUtils.nextBoolean() => " + RandomUtils.nextBoolean()); // the random boolean
    }
}

Explanation

In the above code:

  • On line 1, we import the RandomUtils class.
import org.apache.commons.lang3.RandomUtils;
  • On lines 5 and 6, we use the nextBoolean() method to get the random boolean value, i.e., either true or false, which is displayed accordingly.
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