Statement is still active at the back-end even after closing

​Not sure if this was reported earlier.

I am using PostgreSQL 9.5.8 and JDBC driver 42.1.4

If I execute the following statements and at Position #1, if I check the
pg_stat_activity from another connection (let's say from the psql
application), I can see that the 'Statement s' is still active:

try {
Class.forName("org.postgresql.Driver");
Connection connection = null;
connection =
DriverManager.getConnection("jdbc:postgresql://localhost:5432/cadup","user",
"password");
Statement s = connection.createStatement();
ResultSet rs =s.executeQuery("SELECT 1 FROM core.Person");
if(rs.next()) {
System.err.println("Yes, we got a row!");
} else {
System.err.println("No rows found");
}
s.close();
Thread.sleep(10000); // Position #1
connection.close();
} catch(Exception e) {
e.printStackTrace();
}

===============
Query executed to check the activity:
SELECT pid, datname, now() - pg_stat_activity.query_start AS duration,
state, query
FROM pg_stat_activity
WHERE now() - pg_stat_activity.query_start > interval '1 second';
Output from psql:
pid | datname | duration | state | query
-------+---------+-----------------+-------+---------------------------
17775 | xxxx | 00:00:07.481294 | idle | SELECT 1 FROM core.Person