How to fix Can't use query methods that take a query string on a PreparedStatement error?

Question

Java

I want to add a new value to the table, but an error occurs, although if I go into the table itself, the values ​​are shown:
org.postgresql.util.PSQLException: Can't use query methods that take a query string on a PreparedStatement.
at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:95)
at M2.main(M2.java:22)
Database read error

What should I do in this case?

import java.sql.*;

public class M2 {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        String url = "jdbc:postgresql://localhost:5432/postgres";
        String userName = "postgres";
        String password = "12345";

        Class.forName("org.postgresql.Driver");

        try (Connection conn = DriverManager.getConnection(url, userName, password)) {
            PreparedStatement preparedStat = null;

            try {
                preparedStat = conn.prepareStatement("INSERT INTO books (name, price) VALUES (?, ?)");
                preparedStat.setString(1, "Shindler's List");
                preparedStat.setDouble(2, 32.5);
                preparedStat.execute();

                ResultSet rs = null;
                try {
                    rs = preparedStat.executeQuery("SELECT * FROM books");
                    while (rs.next()) {
                        int id = rs.getInt(1);
                        String name = rs.getString(2);
                        double price = rs.getDouble(3);
                        System.out.println("ID = " + id + "NAME = " + name + "PRICE = " + price);
                    }
                } catch (SQLException e) {
                    e.printStackTrace();
                } finally {
                    if (rs != null) {
                        try {
                            rs.close();
                        } catch (SQLException e) {
                            e.printStackTrace();
                        }
                    } else {
                        System.err.println("Ошибка чтения БД");
                    }
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                preparedStat.close();
            }
        }
    }
}

Answer 1

The variable preparedStatstores the prepared request created by calling the method prepareStatement, it cannot be passed another request by calling executeQuery.

Answer 2

If the values ​​in the table are written, then the block for adding the record has worked, and the error is in the next block for displaying the results in a loop. Put the output in the system by its location of each value. So it will be clear to you on which line of the existing errors