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Java Standard Edition (SE)

TextEvent


java.awt.event

Class TextEvent

  • All Implemented Interfaces:
    Serializable


    public class TextEvent
    extends AWTEvent
    A semantic event which indicates that an object's text changed. This high-level event is generated by an object (such as a TextComponent) when its text changes. The event is passed to every TextListener object which registered to receive such events using the component's addTextListener method.

    The object that implements the TextListener interface gets this TextEvent when the event occurs. The listener is spared the details of processing individual mouse movements and key strokes Instead, it can process a "meaningful" (semantic) event like "text changed".

    An unspecified behavior will be caused if the id parameter of any particular TextEvent instance is not in the range from TEXT_FIRST to TEXT_LAST.

    Since:
    1.1
    See Also:
    TextComponent, TextListener, Serialized Form
    • Field Detail

      • TEXT_FIRST

        public static final int TEXT_FIRST
        The first number in the range of ids used for text events.
        See Also:
        Constant Field Values
      • TEXT_LAST

        public static final int TEXT_LAST
        The last number in the range of ids used for text events.
        See Also:
        Constant Field Values
      • TEXT_VALUE_CHANGED

        public static final int TEXT_VALUE_CHANGED
        This event id indicates that object's text changed.
        See Also:
        Constant Field Values
    • Constructor Detail

      • TextEvent

        public TextEvent(Object source,
                         int id)
        Constructs a TextEvent object.

        This method throws an IllegalArgumentException if source is null.

        Parameters:
        source - The (TextComponent) object that originated the event
        id - An integer that identifies the event type. For information on allowable values, see the class description for TextEvent
        Throws:
        IllegalArgumentException - if source is null
        See Also:
        EventObject.getSource(), AWTEvent.getID()
    • Method Detail

      • paramString

        public String paramString()
        Returns a parameter string identifying this text event. This method is useful for event-logging and for debugging.
        Overrides:
        paramString in class AWTEvent
        Returns:
        a string identifying the event and its attributes


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