[class] DAO

package tbanco.dao;

import java.sql.*;

public class DAO {
    protected Connection conn;
    protected Statement state;
    protected ResultSet result;
    protected final String DRIVER = "jdbc:oracle:thin:USUÁRIO/SENHA@//localhost:1521/XE";
    protected final String JDBC = "oracle.jdbc.OracleDriver";
    protected String lastErrorMessage = "";

    // <editor-fold defaultstate="collapsed" desc="Connect/Disconnect">
    protected boolean connect() {
        boolean success = false;
        try {
            Class.forName(JDBC);
            conn = DriverManager.getConnection(DRIVER);
            state = conn.createStatement();
            success = true;
        } catch (ClassNotFoundException | SQLException e) {
            /* getMessage getErrorCode */
        }
        return success;
    }

    protected boolean disconnect() {
        boolean success = false;
        try {
            conn.close();
            success = true;
        } catch (SQLException e) {
            /* getMessage getErrorCode */
        }
        return success;
    }

    public String getLastErrorMessage() {
        return lastErrorMessage;
    }

    // </editor-fold>
}