This section describes the javax.swing.JTextField class, the javax.swing.text.PlainDocument class, and the javax.swing.event.DocumentListener class.
javax.swing.JTextField - A Swing class representing a UI text field. Some
interesting methods are:
JTextField(int) - Constructor to create a text field with the specified number of columns.
JTextField(String) - Constructor to create a text field with the specified string
as the initial text.
addActionListener(ActionListener) - Method to add an action listener to this text field
to handle action events. Pressing the "Enter" key in this field will trigger one action event.
getDocuement() - Method to return the document object that is used to hold the text of
this field.
getText() - Method to return the text of this field as a string object.
javax.swing.text.PlainDocument - A Swing class representing a plain text document.
PlainDocument is used as the default document for JTextField to hold its text. Method
includes:
addDocumentListener(DocumentListener) - Method to add a document listener to this document.
javax.swing.event.DocumentListener - A Swing interface for the implementing class
to handle document events. Method includes:
changeUpdate(DocumentEvent) - Method to be called when any attribute of the
document is changed.
insertUpdate(DocumentEvent) - Method to be called when text is inserted into the
document.
removeUpdate(DocumentEvent) - Method to be called when text is removed from the
document
