Hsqldb Server

try   
{  
      Class.forName("org.hsqldb.jdbcDriver");  
              
      Connection connection=DriverManager.getConnection("jdbc:hsqldb:hsql://localhost/demodb","sa","");  
              
      System.out.println(connection.isClosed());  
              
}   
catch (Exception e)   
{  
      e.printStackTrace();  
}