Java javax.swing Class JFormattedTextField.AbstractFormatter（JDK8）

Constructor Detail

• AbstractFormatter

  public AbstractFormatter()

Method Detail

• install

  public void install(JFormattedTextField ftf)

  Installs the AbstractFormatter onto a particular JFormattedTextField. This will invoke valueToString to convert the current value from the JFormattedTextField to a String. This will then install the Actions from getActions, the DocumentFilter returned from getDocumentFilter and the NavigationFilter returned from getNavigationFilter onto the JFormattedTextField.

  Subclasses will typically only need to override this if they wish to install additional listeners on the JFormattedTextField.

  If there is a ParseException in converting the current value to a String, this will set the text to an empty String, and mark the JFormattedTextField as being in an invalid state.

  While this is a public method, this is typically only useful for subclassers of JFormattedTextField. JFormattedTextField will invoke this method at the appropriate times when the value changes, or its internal state changes. You will only need to invoke this yourself if you are subclassing JFormattedTextField and installing/uninstalling AbstractFormatter at a different time than JFormattedTextField does.

  Parameters:

  ftf - JFormattedTextField to format for, may be null indicating uninstall from current JFormattedTextField.

• uninstall

  public void uninstall()

  Uninstalls any state the AbstractFormatter may have installed on the JFormattedTextField. This resets the DocumentFilter, NavigationFilter and additional Actions installed on the JFormattedTextField.

• stringToValue

  public abstract Object stringToValue(String text)
                                throws ParseException

  Parses text returning an arbitrary Object. Some formatters may return null.

  Parameters:

  text - String to convert

  Returns:

  Object representation of text

  Throws:

  ParseException - if there is an error in the conversion

• valueToString

  public abstract String valueToString(Object value)
                                throws ParseException

  Returns the string value to display for value.

  Parameters:

  value - Value to convert

  Returns:

  String representation of value

  Throws:

  ParseException - if there is an error in the conversion

• getFormattedTextField

  protected JFormattedTextField getFormattedTextField()

  Returns the current JFormattedTextField the AbstractFormatter is installed on.

  Returns:

  JFormattedTextField formatting for.

• invalidEdit

  protected void invalidEdit()

  This should be invoked when the user types an invalid character. This forwards the call to the current JFormattedTextField.

• setEditValid

  protected void setEditValid(boolean valid)

  Invoke this to update the editValid property of the JFormattedTextField. If you an enforce a policy such that the JFormattedTextField is always in a valid state, you will never need to invoke this.

  Parameters:

  valid - Valid state of the JFormattedTextField

• getActions

  protected Action[] getActions()

  Subclass and override if you wish to provide a custom set of Actions. install will install these on the JFormattedTextField's ActionMap.

  Returns:

  Array of Actions to install on JFormattedTextField

• getDocumentFilter

  protected DocumentFilter getDocumentFilter()

  Subclass and override if you wish to provide a DocumentFilter to restrict what can be input. install will install the returned value onto the JFormattedTextField.

  Returns:

  DocumentFilter to restrict edits

• getNavigationFilter

  protected NavigationFilter getNavigationFilter()

  Subclass and override if you wish to provide a filter to restrict where the user can navigate to. install will install the returned value onto the JFormattedTextField.

  Returns:

  NavigationFilter to restrict navigation

• clone

  protected Object clone()
                  throws CloneNotSupportedException

  Clones the AbstractFormatter. The returned instance is not associated with a JFormattedTextField.

  Overrides:

  clone in class Object

  Returns:

  Copy of the AbstractFormatter

  Throws:

  CloneNotSupportedException - if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.

  See Also:

  Cloneable