Check Database Connection in Java

package com.demo;

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

public class Demo {

    public static void main(String[] args) {
        if (ConnectDB.connection() != null) {
            System.out.println("Successful Connection");
        } else {
            System.out.println("Connection Failed");
        }
        ConnectDB.disconnect();
    }

    public class ConnectDB {

        private static Connection connection;

        public static Connection connection() {
            try {
                Class.forName("com.mysql.cj.jdbc.Driver");
                connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/your_database", "username",
                        "password");
            } catch (Exception e) {
                e.printStackTrace();
                connection = null;
            }
            return connection;
        }

        public static void disconnect() {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }

    }

}