connect

import java.sql.Connection;
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 = "cvr123";

		try {
			// Class.forName("com.mysql.cj.jdbc.Driver");
			con = DriverManager.getConnection(url, username, password);

			System.out.println("Connected!");
			st = con.createStatement();
			System.out.println("Inserting Records into the table");
			// int rowupdate = st.executeUpdate(
			// "insert into book values(33,'Machine Learning through
			// JavaScript','Anderson','Taylor series',2500)");
			ResultSet rs1 = st.executeQuery("Select * from book");
			// Get the values of the record using while loop from result set
			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);
				// String totalMarks= rs1.getInt(5);
				// store the values which are retrieved using ResultSet and print them
				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());
			}
		}
	}
}