Java Waiting for Mysql connection

My application uses a Mysql connection, which is obtained using this code:

public static void Connect(){
    try
    {
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        String url = "jdbc:mysql://" + host + ":" + port + "/"+ db;
        ct = DriverManager.getConnection(url, user, pass);
        st = ct.createStatement();
        System.out.println("Csatlakozva....n");
    }   
    catch (InstantiationException e) 
    {
        Main.textArea.setText("Error : Instantiation!");
        //System.err.println("Error : Instantiation");
        e.printStackTrace();
    }
    catch (IllegalAccessException e) 
    {
        Main.textArea.setText("Error : Illegális Behatolás!");
        //System.err.println("Error : Illegális Behatolás!");
        e.printStackTrace();
    } 
    catch (ClassNotFoundException e)
    {
        Main.textArea.setText("Error : Class Nem Található!");
        //System.err.println("Error : Class Nem Található!");
        e.printStackTrace();
    } 
    catch (SQLException e) 
    {
        Main.textArea.setText("Error : Adatbázis Nem Található!");
        //System.err.println("Error : Adatbázis Nem Található!");
        e.printStackTrace();
    }
}

If the MySQL database server is not running and therefore my app cannot open a connection, how do I make my app wait until a connection can be established?