Nested Class Summary

• Nested classes/interfaces declared in class java.awt.Component

  Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

• Nested classes/interfaces declared in class java.awt.TextComponent

  TextComponent.AccessibleAWTTextComponent

Field Summary

• Fields declared in class java.awt.Component

  accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

• Fields declared in interface java.awt.image.ImageObserver

  ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

• Fields declared in class java.awt.TextComponent

  textListener

Constructor Summary

Method Summary

• Methods declared in class java.awt.Component

  action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paint, paintAll, postEvent, prepareImage, prepareImage, print, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, revalidate, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setMixingCutoutShape, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, update, validate

• Methods declared in class java.lang.Object

  clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

• Methods declared in class java.awt.TextComponent

  addTextListener, enableInputMethods, getBackground, getCaretPosition, getSelectedText, getSelectionEnd, getSelectionStart, getText, getTextListeners, isEditable, processTextEvent, removeNotify, removeTextListener, select, selectAll, setBackground, setCaretPosition, setEditable, setSelectionEnd, setSelectionStart

Constructor Detail

• TextField

  public TextField()
            throws HeadlessException

  Constructs a new text field.

  Throws:

  HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

  See Also:

  GraphicsEnvironment.isHeadless()

• TextField

  public TextField​(String text)
            throws HeadlessException

  Constructs a new text field initialized with the specified text.

  Parameters:

  text - the text to be displayed. If text is null, the empty string "" will be displayed. If text contains EOL and/or LF characters, then each will be replaced by space character.

  Throws:

  HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

  See Also:

  GraphicsEnvironment.isHeadless()

• TextField

  public TextField​(int columns)
            throws HeadlessException

  Constructs a new empty text field with the specified number of columns. A column is an approximate average character width that is platform-dependent.

  Parameters:

  columns - the number of columns. If columns is less than 0, columns is set to 0.

  Throws:

  HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

  See Also:

  GraphicsEnvironment.isHeadless()

• TextField

  public TextField​(String text,
                   int columns)
            throws HeadlessException

  Constructs a new text field initialized with the specified text to be displayed, and wide enough to hold the specified number of columns. A column is an approximate average character width that is platform-dependent.

  Parameters:

  text - the text to be displayed. If text is null, the empty string "" will be displayed. If text contains EOL and/or LF characters, then each will be replaced by space character.

  columns - the number of columns. If columns is less than 0, columns is set to 0.

  Throws:

  HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

  See Also:

  GraphicsEnvironment.isHeadless()

Method Detail

• addNotify

  public void addNotify()

  Creates the TextField's peer. The peer allows us to modify the appearance of the TextField without changing its functionality.

  Overrides:

  addNotify in class TextComponent

  See Also:

  TextComponent.removeNotify()

• getEchoChar

  public char getEchoChar()

  Gets the character that is to be used for echoing.

  An echo character is useful for text fields where user input should not be echoed to the screen, as in the case of a text field for entering a password. If echoChar = 0, user input is echoed to the screen unchanged.

  A Java platform implementation may support only a limited, non-empty set of echo characters. This function returns the echo character originally requested via setEchoChar(). The echo character actually used by the TextField implementation might be different.

  Returns:

  the echo character for this text field.

  See Also:

  echoCharIsSet(), setEchoChar(char)

• setEchoChar

  public void setEchoChar​(char c)

  Sets the echo character for this text field.

  An echo character is useful for text fields where user input should not be echoed to the screen, as in the case of a text field for entering a password. Setting echoChar = 0 allows user input to be echoed to the screen again.

  A Java platform implementation may support only a limited, non-empty set of echo characters. Attempts to set an unsupported echo character will cause the default echo character to be used instead. Subsequent calls to getEchoChar() will return the echo character originally requested. This might or might not be identical to the echo character actually used by the TextField implementation.

  Parameters:

  c - the echo character for this text field.

  Since:

  1.1

  See Also:

  echoCharIsSet(), getEchoChar()

• setEchoCharacter

  @Deprecated
  public void setEchoCharacter​(char c)

  Sets the character to be echoed when protected input is displayed.

  Parameters:

  c - the echo character for this text field

• setText

  public void setText​(String t)

  Sets the text that is presented by this text component to be the specified text.

  Overrides:

  setText in class TextComponent

  Parameters:

  t - the new text. If t is null, the empty string "" will be displayed. If t contains EOL and/or LF characters, then each will be replaced by space character.

  See Also:

  TextComponent.getText()

• echoCharIsSet

  public boolean echoCharIsSet()

  Indicates whether or not this text field has a character set for echoing.

  An echo character is useful for text fields where user input should not be echoed to the screen, as in the case of a text field for entering a password.

  Returns:

  true if this text field has a character set for echoing; false otherwise.

  See Also:

  setEchoChar(char), getEchoChar()

• getColumns

  public int getColumns()

  Gets the number of columns in this text field. A column is an approximate average character width that is platform-dependent.

  Returns:

  the number of columns.

  Since:

  1.1

  See Also:

  setColumns(int)

• setColumns

  public void setColumns​(int columns)

  Sets the number of columns in this text field. A column is an approximate average character width that is platform-dependent.

  Parameters:

  columns - the number of columns.

  Throws:

  IllegalArgumentException - if the value supplied for columns is less than 0.

  Since:

  1.1

  See Also:

  getColumns()

• getPreferredSize

  public Dimension getPreferredSize​(int columns)

  Gets the preferred size of this text field with the specified number of columns.

  Parameters:

  columns - the number of columns in this text field.

  Returns:

  the preferred dimensions for displaying this text field.

  Since:

  1.1

• preferredSize

  @Deprecated
  public Dimension preferredSize​(int columns)

  Returns the preferred size for this text field with the specified number of columns.

  Parameters:

  columns - the number of columns

  Returns:

  the preferred size for the text field

• getPreferredSize

  public Dimension getPreferredSize()

  Gets the preferred size of this text field.

  Overrides:

  getPreferredSize in class Component

  Returns:

  the preferred dimensions for displaying this text field.

  Since:

  1.1

  See Also:

  Component.getMinimumSize(), LayoutManager

• preferredSize

  @Deprecated
  public Dimension preferredSize()

  Description copied from class: Component

  Returns the component's preferred size.

  Overrides:

  preferredSize in class Component

  Returns:

  the component's preferred size

• getMinimumSize

  public Dimension getMinimumSize​(int columns)

  Gets the minimum dimensions for a text field with the specified number of columns.

  Parameters:

  columns - the number of columns in this text field.

  Returns:

  the minimum size for this text field

  Since:

  1.1

• minimumSize

  @Deprecated
  public Dimension minimumSize​(int columns)

  Returns the minimum dimensions for a text field with the specified number of columns.

  Parameters:

  columns - the number of columns

  Returns:

  the minimum size for this text field

• getMinimumSize

  public Dimension getMinimumSize()

  Gets the minimum dimensions for this text field.

  Overrides:

  getMinimumSize in class Component

  Returns:

  the minimum dimensions for displaying this text field.

  Since:

  1.1

  See Also:

  Component.getPreferredSize(), LayoutManager

• minimumSize

  @Deprecated
  public Dimension minimumSize()

  Description copied from class: Component

  Returns the minimum size of this component.

  Overrides:

  minimumSize in class Component

  Returns:

  the minimum size of this component

• addActionListener

  public void addActionListener​(ActionListener l)

  Adds the specified action listener to receive action events from this text field. If l is null, no exception is thrown and no action is performed.

  Refer to AWT Threading Issues for details on AWT's threading model.

  Parameters:

  l - the action listener.

  Since:

  1.1

  See Also:

  removeActionListener(java.awt.event.ActionListener), getActionListeners(), ActionListener

• removeActionListener

  public void removeActionListener​(ActionListener l)

  Removes the specified action listener so that it no longer receives action events from this text field. If l is null, no exception is thrown and no action is performed.

  Refer to AWT Threading Issues for details on AWT's threading model.

  Parameters:

  l - the action listener.

  Since:

  1.1

  See Also:

  addActionListener(java.awt.event.ActionListener), getActionListeners(), ActionListener

• getActionListeners

  public ActionListener[] getActionListeners()

  Returns an array of all the action listeners registered on this textfield.

  Returns:

  all of this textfield's ActionListeners or an empty array if no action listeners are currently registered

  Since:

  1.4

  See Also:

  addActionListener(java.awt.event.ActionListener), removeActionListener(java.awt.event.ActionListener), ActionListener

• getListeners

  public <T extends EventListener> T[] getListeners​(Class<T> listenerType)

  Returns an array of all the objects currently registered as FooListeners upon this TextField. FooListeners are registered using the addFooListener method.

  You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a TextField t for its action listeners with the following code:

  ActionListener[] als = (ActionListener[])(t.getListeners(ActionListener.class));

  If no such listeners exist, this method returns an empty array.

  Overrides:

  getListeners in class TextComponent

  Type Parameters:

  T - the type of the listeners

  Parameters:

  listenerType - the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener

  Returns:

  an array of all objects registered as FooListeners on this textfield, or an empty array if no such listeners have been added

  Throws:

  ClassCastException - if listenerType doesn't specify a class or interface that implements java.util.EventListener

  Since:

  1.3

  See Also:

  getActionListeners()

• processEvent

  protected void processEvent​(AWTEvent e)

  Processes events on this text field. If the event is an instance of ActionEvent, it invokes the processActionEvent method. Otherwise, it invokes processEvent on the superclass.

  Note that if the event parameter is null the behavior is unspecified and may result in an exception.

  Overrides:

  processEvent in class TextComponent

  Parameters:

  e - the event

  Since:

  1.1

  See Also:

  ActionEvent, processActionEvent(java.awt.event.ActionEvent)

• processActionEvent

  protected void processActionEvent​(ActionEvent e)

  Processes action events occurring on this text field by dispatching them to any registered ActionListener objects.

  This method is not called unless action events are enabled for this component. Action events are enabled when one of the following occurs:

  • An ActionListener object is registered via addActionListener.
  • Action events are enabled via enableEvents.

  Note that if the event parameter is null the behavior is unspecified and may result in an exception.

  Parameters:

  e - the action event

  Since:

  1.1

  See Also:

  ActionListener, addActionListener(java.awt.event.ActionListener), Component.enableEvents(long)

• paramString

  protected String paramString()

  Returns a string representing the state of this TextField. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

  Overrides:

  paramString in class TextComponent

  Returns:

  the parameter string of this text field

• getAccessibleContext

  public AccessibleContext getAccessibleContext()

  Gets the AccessibleContext associated with this TextField. For text fields, the AccessibleContext takes the form of an AccessibleAWTTextField. A new AccessibleAWTTextField instance is created if necessary.

  Specified by:

  getAccessibleContext in interface Accessible

  Overrides:

  getAccessibleContext in class TextComponent

  Returns:

  an AccessibleAWTTextField that serves as the AccessibleContext of this TextField

  Since:

  1.3