import java.sql.*;

public class TestSetNull {

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

		Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:5830/jurka?loglevel=2","jurka","");

		Statement stmt = conn.createStatement();
		stmt.execute("CREATE TEMP TABLE nulltest (a int)");
		stmt.close();

		PreparedStatement ps = conn.prepareStatement("INSERT INTO nulltest (a) VALUES (?)");
		ps.setNull(1, Types.INTEGER);
		ps.executeUpdate();

		conn.close();
	}
}