TEXTAREA CLASS IN AWT
TextArea class:
This class
is used to create the text area where we want type the text extending to the multiple rows and
columns.
Constructors:
(i) TextArea() It is
the default constructor of the TextArea class.
The
general form is,
TextArea
objectname =new TextArea();
(ii) TextArea(String) It
is used to create a textarea and assign in it the default string.
The general form is ,
TextArea
objectname=new TextArea(s);
where,
s is the string which will appear in the textarea by default.
(iii) TextArea(int rows,int cols) It used to create a
textarea extending upto the sepcified number of rows and columns.
The
general form is ,
TextArea
objectname=new TextArea(rows,cols)
where,
rows
specify the number of rows to which the TextArea is to be extended.
cols
specify the number of rows to whch the TextArea is to be extended.
(iv) TextArea(String , int ,int) It is used to create a textarea containing the default
text and the specified number of rows and columns.
The general form is ,
TextArea objectname=new
TextArea(s,rows,cols)
where,
s is the
default information
rows
: the numbers of rows to which the textarea is extended.
cols : the number of cols to which the textarea is
extended.
Method
(i) setText() This method is used to text to be
displayed in the text area.
The
general form is
void
setText(String s)
where
s
is the information which we want to set in the textarea.
(ii) getText() This method is used to get the
text present in the text area.
The
general form is ,
String
getText()
(iii) getSelectedText() This
method will return only the selected text present in the text area.
The
general form is,
String
getSelectedText()
(iv) getSelectionStart() This
method is used to return the index of the position from where the selection
starts
. The
general form is ,
int
getSelectionStart()
(v) getSelectionEnd() This
method is used to return the index of the position where the selection ends.
The
general form is ,
int
getSelectionEnd()
(vi) setSelectionStart() This
method is used to specify the index position where we want to starts the selection.
The
general form is ,
void
setSelectionStart(int index)
where,
index
specify the starting index position.
(vii) setSelectionEnd() This
method is used to specify the index position where we want to end the
selection.
The
general form is ,
void
setSelectionEnd(int index)
where,
index
specify the ending index position
viii) select() This
method is used to select the text from the
specified index position upto another index
position.
The
general form is ,
void
select(int sindex,int eindex)
where,
sindex
specify the starting index position.
eindex
specify the ending index position.
(ix) selectAll() This method is used to select all the
text present in the textarea
The
general form is ,
void
selectAll()
(x) addTextListener() This
method is used to register the TextArea to recieve the text events.
The
general form is ,
void
addTextListener(TextListener tl)
(xi) removeTextListener() This
method is used to unregister the TextArea to recieve the text events.
The
general form is ,
void
removeTextListener()
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