TextComponent, TextField, TextArea

TextComponent ist die Basisklasse für TextField und TextArea und dient als Methodenlieferant für diese Klassen.

Methoden
Returntyp Name der Methode

Eventhandling

void

addTextListener(TextListener l)
Adds the specified text event listener to receive text events from this text component.

void

removeTextListener(TextListener l)
Removes the specified text event listener so that it no longer receives text events from this text component If l is null, no exception is thrown and no action is performed.

TextListener[]
getTextListeners()
Returns an array of all the text listeners registered on this text component.

Textbearbeitung

int
getCaretPosition()
Gets the position of the text insertion caret for this text component.

void
setCaretPosition(int position)
Sets the position of the text insertion caret for this text component.

void
selectAll()
Selects all the text in this text component.

void
select(int selectionStart, int selectionEnd)
Selects the text between the specified start and end positions.

int
getSelectionStart()
Gets the start position of the selected text in this text component.

void
setSelectionStart(int selectionStart)
Sets the selection start for this text component to the specified position.

int
getSelectionEnd()
Gets the end position of the selected text in this text component.

void
setSelectionEnd(int selectionEnd)
Sets the selection end for this text component to the specified position.

String
getSelectedText()
Returns the selected text from the text that is presented by this text component.

String
getText()
Returns the text that is presented by this text component.

void
setText(String text)
Sets the text that is presented by this text component to be the specified text.

boolean
isEditable()
Indicates whether or not this text component is editable.

void
setEditable(boolean b)
Sets the flag that determines whether or not this text component is editable.

TextField

Methoden
Returntyp	Name der Methode
Eventhandling
void	addTextListener(TextListener l) Adds the specified text event listener to receive text events from this text component.
void	removeTextListener(TextListener l) Removes the specified text event listener so that it no longer receives text events from this text component If l is null, no exception is thrown and no action is performed.
TextListener[]	getTextListeners() Returns an array of all the text listeners registered on this text component.
Textbearbeitung
int	getCaretPosition() Gets the position of the text insertion caret for this text component.
void	setCaretPosition(int position) Sets the position of the text insertion caret for this text component.
void	selectAll() Selects all the text in this text component.
void	select(int selectionStart, int selectionEnd) Selects the text between the specified start and end positions.
int	getSelectionStart() Gets the start position of the selected text in this text component.
void	setSelectionStart(int selectionStart) Sets the selection start for this text component to the specified position.
int	getSelectionEnd() Gets the end position of the selected text in this text component.
void	setSelectionEnd(int selectionEnd) Sets the selection end for this text component to the specified position.
String	getSelectedText() Returns the selected text from the text that is presented by this text component.
String	getText() Returns the text that is presented by this text component.
void	setText(String text) Sets the text that is presented by this text component to be the specified text.
boolean	isEditable() Indicates whether or not this text component is editable.
void	setEditable(boolean b) Sets the flag that determines whether or not this text component is editable.

Konstruktoren

TextField() Constructs a new text field.

TextField(int columns) Constructs a new empty text field with the specified number of columns.

TextField(String text) Constructs a new text field initialized with the specified text.

TextField(String text, int columns) Constructs a new text field initialized with the specified text to be displayed, and wide enough to hold the specified number of columns.

Methoden
Returntyp Name der Methode

Eventhandling

void
addActionListener(ActionListener l)
Adds the specified action listener to receive action events from this text field.

void
removeActionListener(ActionListener l)
Removes the specified action listener so that it no longer receives action events from this text field.

ActionListener[]
getActionListeners()
Returns an array of all the action listeners registered on this textfield.

weitere Methoden

int
getColumns()
Gets the number of columns in this text field.

void
setColumns(int columns)
Sets the number of columns in this text field.

char
getEchoChar()
Gets the character that is to be used for echoing.

void
setEchoChar(char c)
Sets the echo character for this text field.

boolean
echoCharIsSet()
Indicates whether or not this text field has a character set for echoing.

Reaktion auf TextFelder

Ein TextFeld kann u.a. Actionereignisse und Textereignisse senden. Einzelheiten hierzu findet man im Kapitel Eventhandling.

TextArea

Methoden
Returntyp	Name der Methode
Eventhandling
void	addActionListener(ActionListener l) Adds the specified action listener to receive action events from this text field.
void	removeActionListener(ActionListener l) Removes the specified action listener so that it no longer receives action events from this text field.
ActionListener[]	getActionListeners() Returns an array of all the action listeners registered on this textfield.
weitere Methoden
int	getColumns() Gets the number of columns in this text field.
void	setColumns(int columns) Sets the number of columns in this text field.
char	getEchoChar() Gets the character that is to be used for echoing.
void	setEchoChar(char c) Sets the echo character for this text field.
boolean	echoCharIsSet() Indicates whether or not this text field has a character set for echoing.

Konstanten
Typ Name der Konstante

static int
SCROLLBARS_BOTH
Create and display both vertical and horizontal scrollbars.

static int
SCROLLBARS_HORIZONTAL_ONLY
Create and display horizontal scrollbar only.

static int
SCROLLBARS_VERTICAL_ONLY
Create and display vertical scrollbar only.

static int
SCROLLBARS_NONE
Do not create or display any scrollbars for the text area.

Konstruktoren

TextArea() Constructs a new text area with the empty string as text.

TextArea(int rows, int columns)
Constructs a new text area with the specified number of rows and columns and the empty string as text.

TextArea(String text)
Constructs a new text area with the specified text.

TextArea(String text, int rows, int columns)
Constructs a new text area with the specified text, and with the specified number of rows and columns.

TextArea(String text, int rows, int columns, int scrollbars)
Constructs a new text area with the specified text, and with the rows, columns, and scroll bar visibility as specified.

Methoden
Returntyp Name der Methode

Textbearbeitung

void
append(String str)
Appends the given text to the text area's current text.

void
insert(String str, int pos)
Inserts the specified text at the specified position in this text area.

void
replaceRange(String str, int start, int end)
Replaces text between the indicated start and end positions with the specified replacement text.

Erscheinung

int
getColumns()
Returns the number of columns in this text area.

void
setColumns(int columns)
Sets the number of columns for this text area.

int
getRows()
Returns the number of rows in the text area.

void
setRows(int rows)
Sets the number of rows for this text area.

int
getScrollbarVisibility()
Returns an enumerated value that indicates which scroll bars the text area uses.

Reaktion auf TextAreas

Eine TextArea kann u.a. Textereignisse senden. Einzelheiten hierzu findet man im Kapitel Eventhandling.

Konstruktoren
TextField()	Constructs a new text field.
TextField(int columns)	Constructs a new empty text field with the specified number of columns.
TextField(String text)	Constructs a new text field initialized with the specified text.
TextField(String text, int columns)	Constructs a new text field initialized with the specified text to be displayed, and wide enough to hold the specified number of columns.

Konstanten
Typ	Name der Konstante
static int	SCROLLBARS_BOTH Create and display both vertical and horizontal scrollbars.
static int	SCROLLBARS_HORIZONTAL_ONLY Create and display horizontal scrollbar only.
static int	SCROLLBARS_VERTICAL_ONLY Create and display vertical scrollbar only.
static int	SCROLLBARS_NONE Do not create or display any scrollbars for the text area.

Konstruktoren
TextArea()	Constructs a new text area with the empty string as text.
TextArea(int rows, int columns)	Constructs a new text area with the specified number of rows and columns and the empty string as text.
TextArea(String text)	Constructs a new text area with the specified text.
TextArea(String text, int rows, int columns)	Constructs a new text area with the specified text, and with the specified number of rows and columns.
TextArea(String text, int rows, int columns, int scrollbars)	Constructs a new text area with the specified text, and with the rows, columns, and scroll bar visibility as specified.