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Class java.awt.TextField

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.TextComponent
                   |
                   +----java.awt.TextField

public class TextField

extends TextComponent

TextField()

Constructs a new TextField.

TextField(int)

Constructs a new empty TextField with the specified number of columns.

TextField(String)

Constructs a new TextField initialized with the specified text.

TextField(String, int)

Constructs a new TextField initialized with the specified text and columns.

addActionListener(ActionListener)

Adds the specified action listener to recieve action events from this textfield.

addNotify()

Creates the TextField's peer.

echoCharIsSet()

Returns true if this TextField has a character set for echoing.

getColumns()

Returns the number of columns in this TextField.

getEchoChar()

Returns the character to be used for echoing.

getMinimumSize()

Returns the minimum size Dimensions needed for this TextField.

getMinimumSize(int)

Returns the minimum size Dimensions needed for this TextField with the specified amount of columns.

getPreferredSize()

Returns the preferred size Dimensions needed for this TextField.

getPreferredSize(int)

Returns the preferred size Dimensions needed for this TextField with the specified amount of columns.

minimumSize()

Deprecated.

minimumSize(int)

Deprecated.

paramString()

Returns the String of parameters for this TextField.

preferredSize()

Deprecated.

preferredSize(int)

Deprecated.

processActionEvent(ActionEvent)

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

processEvent(AWTEvent)

Processes events on this textfield.

removeActionListener(ActionListener)

Removes the specified action listener so that it no longer receives action events from this textfield.

setColumns(int)

Sets the number of columns in this TextField.

setEchoChar(char)

Sets the echo character for this TextField.

setEchoCharacter(char)

Deprecated.

  public TextField()

Constructs a new TextField.

  public TextField(String text)

Constructs a new TextField initialized with the specified text.

Parameters:

text - the text to be displayed

  public TextField(int columns)

Constructs a new empty TextField with the specified number of columns.

Parameters:

columns - the number of columns

  public TextField(String text,
                   int columns)

Constructs a new TextField initialized with the specified text and columns.

Parameters:

text - the text to be displayed

columns - the number of columns

  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 Component

  public char getEchoChar()

Returns the character to be used for echoing.

See Also:

setEchoChar, echoCharIsSet

  public void setEchoChar(char c)

Sets the echo character for this TextField. This is useful for fields where the user input shouldn't be echoed to the screen, as in the case of a TextField that represents a password.

Parameters:

c - the echo character for this TextField

See Also:

echoCharIsSet, getEchoChar

  public void setEchoCharacter(char c)

Note: setEchoCharacter() is deprecated. As of JDK version 1.1, replaced by setEchoChar(char).

  public boolean echoCharIsSet()

Returns true if this TextField has a character set for echoing.

See Also:

setEchoChar, getEchoChar

  public int getColumns()

Returns the number of columns in this TextField.

  public void setColumns(int columns)

Sets the number of columns in this TextField.

Parameters:

columns - the number of columns

Throws: IllegalArgumentException

If columns is less than 0.

  public Dimension getPreferredSize(int columns)

Returns the preferred size Dimensions needed for this TextField with the specified amount of columns.

Parameters:

columns - the number of columns in this TextField

  public Dimension preferredSize(int columns)

Note: preferredSize() is deprecated. As of JDK version 1.1, replaced by getPreferredSize(int).

  public Dimension getPreferredSize()

Returns the preferred size Dimensions needed for this TextField.

Overrides:

getPreferredSize in class Component

  public Dimension preferredSize()

Note: preferredSize() is deprecated. As of JDK version 1.1, replaced by getPreferredSize().

Overrides:

preferredSize in class Component

  public Dimension getMinimumSize(int columns)

Returns the minimum size Dimensions needed for this TextField with the specified amount of columns.

Parameters:

columns - the number of columns in this TextField

  public Dimension minimumSize(int columns)

Note: minimumSize() is deprecated. As of JDK version 1.1, replaced by getMinimumSize(int).

  public Dimension getMinimumSize()

Returns the minimum size Dimensions needed for this TextField.

Overrides:

getMinimumSize in class Component

  public Dimension minimumSize()

Note: minimumSize() is deprecated. As of JDK version 1.1, replaced by getMinimumSize().

Overrides:

minimumSize in class Component

  public void addActionListener(ActionListener l)

Adds the specified action listener to recieve action events from this textfield.

Parameters:

l - the action listener

  public void removeActionListener(ActionListener l)

Removes the specified action listener so that it no longer receives action events from this textfield.

Parameters:

l - the action listener

  protected void processEvent(AWTEvent e)

Processes events on this textfield. If the event is an ActionEvent, it invokes the processActionEvent method, else it invokes its superclass's processEvent.

Parameters:

e - the event

Overrides:

processEvent in class TextComponent

  protected void processActionEvent(ActionEvent e)

Processes action events occurring on this textfield by dispatching them to any registered ActionListener objects. NOTE: This method will not be called unless action events are enabled for this component; this happens when one of the following occurs: a) An ActionListener object is registered via addActionListener() b) Action events are enabled via enableEvents()

Parameters:

e - the action event

See Also:

enableEvents

  protected String paramString()

Returns the String of parameters for this TextField.

Overrides:

paramString in class TextComponent

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