This is just just a copy of swisseph-2.01.00-java-src-01.zip from http://th-mack.de/international/download/.
The license seems to pretty open. Please visit http://th-mack.de/international/download/ to see small license related text.
I put it so that it is possible to use this package with maven. How to use?
Add jitpack repostitory in your pom.xml:
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
And then add dependency:
<dependency>
<groupId>com.github.krishnact</groupId>
<artifactId>swisseph</artifactId>
<version>-SNAPSHOT</version>
</dependency>