Using BaseX Local/Embedded via XQJ 1.3.0-SNAPSHOT.

pom.xml

<?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>net.xqj</groupId>
   <artifactId>basex-xqj-example</artifactId>
   <version>0.0.1</version>
   <packaging>jar</packaging>

   <dependencies>
      <dependency>
         <groupId>net.xqj</groupId>
         <artifactId>basex-xqj</artifactId>
         <version>1.3.0-SNAPSHOT</version>
      </dependency>
      <dependency>
        <groupId>org.basex</groupId>
        <artifactId>basex</artifactId>
        <version>7.8-SNAPSHOT</version>
      </dependency>
   </dependencies>

   <repositories>

      <repository>
         <id>basex</id>
         <name>BaseX Maven Repository</name>
         <url>http://files.basex.org/maven</url>
      </repository>

      <repository>
         <id>xqj.net</id>
         <name>XQJ.NET Maven Repository</name>
         <url>http://xqj.net/maven</url>
      </repository>

   </repositories>

</project>

XQueryExample.java

import net.xqj.basex.local.BaseXXQDataSource;
import javax.xml.xquery.*;

public class XQueryExample
{
  public static void main(String[] args) throws XQException
  {
    XQDataSource xqds = new BaseXXQDataSource();

    XQConnection conn = xqds.getConnection();

    XQPreparedExpression xqpe =
      conn.prepareExpression("1,2,3,4");

    XQResultSequence rs = xqpe.executeQuery();

    while(rs.next())
      System.out.println(rs.getItemAsString(null));

    conn.close();
  }
}