JavaToMySQL.java

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

/**
 * Simple Java program to connect to MySQL database running on localhost and
 * running SELECT and INSERT query to retrieve and add data.
 */
public class JavaToMySQL {

    // JDBC URL, username and password of MySQL server
    private static final String url = "jdbc:mysql://localhost:3306/attendance";
    private static final String user = "root";
    private static final String password = "123";

    // JDBC variables for opening and managing connection
    private static Connection con;
    private static Statement stmt;
    private static ResultSet rs;

    public static void main(String args[]) {
        String query = "select * from csc_classcount";
        try {
            // opening database connection to MySQL server
            con = DriverManager.getConnection(url, user, password);

            // getting Statement object to execute query
            stmt = con.createStatement();

            // executing SELECT query
            rs = stmt.executeQuery(query);

            while (rs.next()) {
                System.out.println(rs.getString(1)+" : " + rs.getString(2));
            }

        } catch (SQLException sqlEx) {
            sqlEx.printStackTrace();
        } finally {
            //close connection ,stmt and resultset here
            try { con.close(); } catch(SQLException se) { /*can't do anything */ }
            try { stmt.close(); } catch(SQLException se) { /*can't do anything */ }
            try { rs.close(); } catch(SQLException se) { /*can't do anything */ }
        }
    }

}