Java Reference
In-Depth Information
AWTsupportstransferringarbitraryobjectsbetweenapplicationsviathe
system clip-
board
,andtransferringobjectswithinanapplicationviaa
private clipboard
.Thissup-
portconsistsofthe
java.awt.datatransfer
packagewithits
ClipboardOwn-
er
,
FlavorListener
,
FlavorMap
,
FlavorTable
, and
Transferable
in-
terfaces; and
Clipboard
,
DataFlavor
,
FlavorEvent
,
StringSelection
,
SystemFlavorMap
,
MimeTypeParseException
, and
UnsupportedFla-
vorException
classes.
Clipboard
provides a mechanism for transferring data to a clipboard by using
cut/copy/paste operations. You can obtain a
singleton
(single instance)
Clipboard
object that provides access to the native clipboard facilities offered by the platform's
windowingsystembycalling
Toolkit
's
Clipboard getSystemClipboard()
method; for example,
Clipboard clipboard =
Toolkit.getDefaultToolkit.getSystemClipboard();
. Alternatively,
you can obtain a private clipboard by instantiating
Clipboard
.
Clipboard
declares a
void setContents(Transferable contents,
ClipboardOwner owner)
methodthatsetsthecurrentcontentsoftheclipboardto
thespecifiedtransferableobjectandregistersthespecifiedclipboardownerastheowner
ofthenewcontents.Thismethodthrows
java.lang.IllegalStateException
when the clipboard is currently unavailable.
Thetransferableobjectthat'spassedto
contents
iscreatedfromaclassthatimple-
ments the
Transferable
interface in terms of the following three methods:
•
Object getTransferData(DataFlavor flavor)
returnsanobject
containing the data being transferred. The
DataFlavor
argument identifies
the
flavor
(format)ofthisdata(e.g.,astringoraJPEGimage)byencapsulating
the data's Multipurpose Internet Mail Extensions (MIME) type—
ht-
MIME—andahuman-presentablenamedescribingthisdataformat.Thismeth-
odthrows
java.io.IOException
whenthedataisnolongeravailablein
the requested flavor, and
UnsupportedFlavorException
when the re-
quested data flavor isn't supported.
•
DataFlavor[] getTransferDataFlavors()
returns an array of
DataFlavor
objectsthatindicatetheflavorsofthedatathatthistransferable
object can provide.
