Spotless is a general-purpose formatting plugin used by 4,000 projects on GitHub (August 2020). Plugin requires a version of Maven higher or equal to 3.1.0. A clean and formatted code is what every developer needs to be delivered. It improves the readability of the code. And you leave a good impression in the community. So first of all I will show you the maven integration of the spotless plugin.

Set up with Maven project
See full documentation  https://github.com/diffplug/spotless/tree/main/plugin-maven
Checkout the latest version - https://mvnrepository.com/artifact/com.diffplug.spotless/spotless-maven-plugin

You have to add the below code snippet in between <plugins></plugins> tag of your pom.xml

<plugin>
    <groupId>com.diffplug.spotless</groupId>
    <artifactId>spotless-maven-plugin</artifactId>
    <version>2.25.0</version>
    <configuration>
        <formats>
            <!-- you can define as many formats as you want, each is independent -->
            <format>
                <!-- define the files to apply to -->
                <includes>
                    <include>src/main/java/**/*.java</include>
                    <include>src/test/java/**/*.java</include>
                </includes>
                <!-- define the steps to apply to those files -->
                <trimTrailingWhitespace/>
                <endWithNewline/>
                <indent>
                    <tabs>true</tabs>
                    <spacesPerTab>4</spacesPerTab>
                </indent>
            </format>
        </formats>
        <!-- define a language-specific format -->
        <java>
            <toggleOffOn>
                <off>@formatter:off</off>
                <on>@formatter:on</on>
            </toggleOffOn>
            <!-- no need to specify files, inferred automatically, but you can if you want -->

            <!-- apply a specific flavor of google-java-format and reflow long strings -->
            <palantirJavaFormat>
                <version>2.24.0</version>
            </palantirJavaFormat>

            <!-- make sure every file has the following copyright header.
              optionally, Spotless can set copyright years by digging
              through git history (see "license" section below) -->
            <licenseHeader>
                <content>
                    /***********************************************************
                    *  ${organization.name} Pvt. Ltd. CONFIDENTIAL
                    *
                    *  © 2022-2023 All Rights Reserved.
                    *
                    * NOTICE:  All information contained herein is, and remains the property
                    * of ${organization.name}. The intellectual and technical concepts contained
                    * herein are proprietary to ${organization.name} Incorporated may be covered by U.S.
                    * and Foreign Patents, patents in process, and are protected by trade
                    * secret or copyright law.
                    *
                    * Dissemination of this information or reproduction of this material
                    * is strictly forbidden unless prior written permission is obtained
                    * from ${organization.name} Pvt. Ltd.
                    ***********************************************************/
                </content>
            </licenseHeader>
        </java>
    </configuration>
</plugin>

Execute command  mvn spotless:apply  in your project directory to apply this plugin.

Set up with Gradle project
See full documentation  https://github.com/diffplug/spotless/tree/main/plugin-gradle
Checkout the latest version - https://mvnrepository.com/artifact/com.diffplug.spotless/spotless-plugin-gradle

update your build.gradle file as show below

plugins {
    id "com.diffplug.spotless" version "6.11.0"
}

spotless {
    java {
        toggleOffOn('format:off', 'format:on')
        target '*/**/*.java'
        // You probably want an empty string at the end - all of the
        // imports you didn't specify explicitly will go there.
        removeUnusedImports()
        googleJavaFormat()
        importOrder('lombok', 'java', 'javax', 'com', 'com', 'org', 'com.example') // standard import order
        licenseHeader '/***********************************************************\n' +
                        '*  ${organization.name} Pvt. Ltd. CONFIDENTIAL\n' +
                        '*\n' +
                        '*  © 2022-2023 All Rights Reserved.\n' +
                        '*\n' +
                        '* NOTICE:  All information contained herein is, and remains the property\n' +
                        '* of ${organization.name}. The intellectual and technical concepts contained\n' +
                        '* herein are proprietary to ${organization.name} Incorporated may be covered by U.S.\n' +
                        '* and Foreign Patents, patents in process, and are protected by trade\n' +
                        '* secret or copyright law.\n' +
                        '*\n' +
                        '* Dissemination of this information or reproduction of this material\n' +
                        '* is strictly forbidden unless prior written permission is obtained\n' +
                        '* from ${organization.name} Pvt. Ltd.\n' +
                        '***********************************************************/'
            }
}
Execute command  ./gradlew spotlessApply  in your project directory to apply this plugin.