Banco de Dados

import java.net.*;
import java.sql.*;

/**
 *
 * @author Isael Faria Junior
 */
public class GerenciaBanco {
    private static final String URL = "jdbc:mysql://ip/java_teste";
    private static final String DRIVER = "com.mysql.jdbc.Driver";
    private static final String USUARIO = "root";
    private static final String SENHA = ""; 
    /** Creates a new instance of GerenciaBanco */
    public GerenciaBanco(){
    }
    
    public void Conectar_banco() throws SQLException,ClassNotFoundException {
        Class.forName(DRIVER);
        Connection conn = DriverManager.getConnection(URL,USUARIO, SENHA);
    }

}

MESSAGE: java.net.ConnectException: Connection refused: connect