hsqldb memory mode

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;


public class Deleteme {

	public static void main(String[] args) throws Exception {
		Class.forName("org.hsqldb.jdbcDriver");
		Connection c = DriverManager.getConnection("jdbc:hsqldb:mem:tt", "sa", "");
		Statement s = c.createStatement();
		s.execute("create table x (i int)");
		s.close();
		
		for (int i=1; i< 100; i++) {
			s = c.createStatement();
			s.execute("insert into x values  (" + i + ")");
			s.close();
		}
		
		s = c.createStatement();
		ResultSet r = s.executeQuery("select * from x");
		while(r.next()) {
			System.out.println(r.getString(1));
		}
	}
}