import java.sql.*;

public class PingTest {

	public static void main(String args[]) throws Exception {
		Class.forName("org.postgresql.Driver");

		Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:5820/jurka","jurka","");

		conn.setAutoCommit(false);
		Statement stmt = conn.createStatement();
		try {
			stmt.execute("SELECT 1/0");
		} catch (SQLException sqle) {
			sqle.printStackTrace();
		}

		System.out.println(((org.postgresql.jdbc2.AbstractJdbc2Connection)conn).ping());

		stmt.execute("SELECT 1");
	}
}