conem

import java.sql.Connection;
import java.sql.*;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.Statement;

public class JdbcConnectionExample {

    public static void main(String[] args) throws ClassNotFoundException {

        
        Connection con = null;
        Statement st = null;
        String url = "jdbc:oracle:thin:@//localhost:1521/XE";
        String username = "system";
        String password = "1234";

        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            con = DriverManager.getConnection(url, username, password);

            System.out.println("Connected!");
            st = con.createStatement();
            
            ResultSet rs1 = st.executeQuery("Select * from book");
            
            while (rs1.next()) {
                int id = rs1.getInt(1);
                String title = rs1.getString(2);
                String author = rs1.getString(3);
                String publisher = rs1.getString(4);
                int price = rs1.getInt(5);
                
                System.out.println(id + "," + title + "," + author + "," + publisher + "," + price);
            }

        } catch (SQLException ex) {
            throw new Error("Error ", ex);
        } finally {
            try {
                if (con != null) {
                    con.close();
                }
            } catch (SQLException ex) {
                System.out.println(ex.getMessage());
            }
        }
    }
}