Unable to build using mvn

[sugeeth14]

Hi I am trying to build using the steps here

But I am getting the following error when I run mvn package

Results :

Tests run: 9, Failures: 0, Errors: 0, Skipped: 0

[INFO] 
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ jfasttext ---
[INFO] Building jar: /home/JFastText/target/jfasttext-0.4.jar
[INFO] 
[INFO] --- maven-javadoc-plugin:2.9.1:jar (attach-javadocs) @ jfasttext ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  19.733 s
[INFO] Finished at: 2020-04-24T20:00:01+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:2.9.1:jar (attach-javadocs) on project jfasttext: MavenReportException: Error while creating archive: Unable to find javadoc command: The environment variable JAVA_HOME is not correctly set. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Is there any mistake installation ? Please help. Thanks.