import java.sql.*;

public class StmtNpe {

	public static void main(String args[]) throws Exception {
		Class.forName("org.postgresql.Driver");
		Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:5432/jurka","jurka","");
		Statement stmt = conn.createStatement();
		PreparedStatement pstmt = conn.prepareStatement("SELECT A FROM B WHERE c = ? AND d = ?");
//		pstmt.setInt(1,5);
		pstmt.setInt(2,4);
		System.out.println(stmt);
		System.out.println(pstmt);
	}
}