What is the ComparableUtils.gt() method in Java?

How to import `ComparableUtils`

The definition of ComparableUtils 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 ComparableUtils class in the following way:

import org.apache.commons.lang3.compare.ComparableUtils;

Syntax

public static <A extends Comparable<A>> Predicate<A> gt(final A b)

Parameters

final A b: This is the object to be compared to in the returned predicate.

Return value

This method returns a predicate.

<?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 ComparableUtils is included in the pom.xml file.

Main.java

Lines 1-2: We import the relevant classes are imported.
Line 7: We define an integer variable called val.
Line 8: We pass val as the parameter to the ComparableUtils.gt() method. This returns a predicate called greaterThan.
Line 9: We define an integer test value called testVal.
Line 10: We use the test() method of the predicate to test whether testVal is greater than val. The comparison’s result is printed.
Line 11: We assign a new test value to testVal.
Line 12: We use the test() method of the predicate to test whether testVal is greater than val. The comparison’s result is printed.