The TextField class is used to take one-line or multiple-line input from a user. The number of characters depends upon the maximum size of the TextField. The general syntax to create a TextField is as follows:
The label defines the visual text displayed before the text box.
The input is the text entered by a user.
The size defines the maximum number of characters the TextField is capable of taking.
The constraint defines the TextField constants. These constants are listed below:
CONSTRAINT_MASK: It determines the constraint’s current value.
ANY: It takes any character as input.
EMAILADDR: It takes only a valid email address.
NUMERIC: It takes both positive and negative numbers.
PASSWORD: It hides the input while a user is entering data.
PHONENUMBER: It takes only valid phone numbers.
URL: It takes the valid address of a Web site.
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