MySQL - Class

package net.bausucht.enrico.coinsystem;

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

public class MySQL {

	public static String host = "173.212.248.242";
	public static String port = "3306";
	public static String database = "Enrico_A007-BauSucht-JavaTest";
	public static String username = "Enrico_A007";
	public static String password = "i98B2fiaUrsQoPJQMsvN";
	public static Connection con;


	public static void connect() {
		if(!(isConnected())) {
			try {
				con = DriverManager.getConnection("jdbc::mysql:://" + host + ":" + port + "/" + database, username, password);

			}catch(SQLException e) {
				e.printStackTrace();
			}
		}
	}

	public static void disconnect() {
		if(isConnected()) {
			try {
				con.close();
			}catch(SQLException e) {
				e.printStackTrace();
			}
		}

	}

	public static boolean isConnected() {
		return(con == null ? false : true);
	}

	public static void update(String qry) {
		try {
			PreparedStatement ps = con.prepareStatement(qry);
			ps.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		}

	}

	public static ResultSet getResult(String qry) {
		PreparedStatement ps;
		try {
			ps = con.prepareStatement(qry);
			return ps.executeQuery();
		} catch (SQLException e) {
			e.printStackTrace();
		}catch (NullPointerException e) {
			e.printStackTrace();
		}
		return null;
	}
}