What is the BooleanUtils.toBooleanDefaultIfNull method in Java?
Overview
In Java, toBooleanDefaultIfNull() is a static method of the BooleanUtils class converts the passed wrapper class Boolean parameter to the primitive Boolean type. The method takes another boolean parameter by the name valueIfNull. valueIfNull is returned if the passed Boolean value is null.
How to import BooleanUtils
The definition of BooleanUtils can be found in the Apache Commons Lang package. We can add this 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 BooleanUtils class in the following way:
import org.apache.commons.lang3.BooleanUtils;
Syntax
public static boolean toBooleanDefaultIfNull(final Boolean bool, final boolean valueIfNull)
Parameters
- **
final Boolean bool**: This is theBooleanvalue to check. final boolean valueIfNull: This the value to return ifboolisnull.
Return value
This method returns valueIfNull if bool is null. Otherwise, it returns the primitive version of the bool value.
Code
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>test</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>Main</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>Explanation
The maven dependency for BooleanUtils is included in the pom.xml file.
Main.java
- Line 1: We import the
BooleanUtilsclass… - Line 6 and 7: We set
boolandvalueIfNullvalues. - Line 8: We pass two arguments and the
toBooleanDefaultIfNull(bool, valueIfNull)function tells ifboolis null or not.
