JDBC

package oracle;

import java.sql.*;

public class Oracle {

    public static void main(String[] args) {
        Connection conn = null;
        try {
            String driverName = "oracle.jdbc.driver.OracleDriver";
            Class.forName(driverName);
            String serverName = "localhost";
            String serverPort = "1521";
            String sid = "Jami20";
            String url = "jdbc:oracle:thin:@" + serverName + ":" + serverPort + ":" + sid;
            String username = "JAMI";
            String password = "JAMI20";
            conn = DriverManager.getConnection(url, username, password);
            System.out.println("Connected to the database!");
        } catch (ClassNotFoundException e) {
            System.out.println("Could not find the database driver " + e.getMessage());
        } catch (SQLException e) {
            System.out.println("Could not connect to the database " + e.getMessage());
        }

        try {
            Statement st = conn.createStatement();
            ResultSet rs = st.executeQuery("Select * from testing");
            while (rs.next()) {
                String name = rs.getString("name");
                int no = rs.getInt("no");
                System.out.println(no + ": " + name);
            }
            rs.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}