java - How to convert / cast long to String? -

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I have just created Sample BB App, which can allow the date to be selected. 

  DateField CurDateFld = New date field ("Select date:", System content time milliseau (), datefield.det (DateField.FIELD_LEFT);

date After selecting, I need to convert that long value to string so that I can easily store the date value anywhere in the database. I am new to Java and Blackberry development. 

  Long date = curDateFld.getDate ();

How do I change this long value for the string? In addition, I want to convert from the string so far. I think I can use the long l = long.Personal ("myStr"); ?

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