Class Clipboard

public class Clipboard
extends Object

A class that implements a mechanism to transfer data using cut/copy/paste operations.

FlavorListeners may be registered on an instance of the Clipboard class to be notified about changes to the set of DataFlavors available on this clipboard (see addFlavorListener(java.awt.datatransfer.FlavorListener)).

Fields

owner

protected ClipboardOwner owner

contents

protected Transferable contents

Constructors

Clipboard

public Clipboard(String name)

Creates a clipboard object.

See Also:

Toolkit.getSystemClipboard()

Methods

getName

public String getName()

Returns the name of this clipboard object.

See Also:

Toolkit.getSystemClipboard()

setContents

public void setContents(Transferable contents,
                        ClipboardOwner owner)

Parameters:

contents - the transferable object representing the clipboard content

owner - the object which owns the clipboard content

Throws:

IllegalStateException - if the clipboard is currently unavailable

See Also:

Toolkit.getSystemClipboard()

getContents

public Transferable getContents(Object requestor)

Returns a transferable object representing the current contents of the clipboard. If the clipboard currently has no contents, it returns null. The parameter Object requestor is not currently used. The method throws IllegalStateException if the clipboard is currently unavailable. For example, on some platforms, the system clipboard is unavailable while it is accessed by another application.

Parameters:

requestor - the object requesting the clip data (not used)

Returns:

the current transferable object on the clipboard

Throws:

IllegalStateException - if the clipboard is currently unavailable

See Also:

Toolkit.getSystemClipboard()

getAvailableDataFlavors

public DataFlavor[] getAvailableDataFlavors()

Returns an array of DataFlavors in which the current contents of this clipboard can be provided. If there are no DataFlavors available, this method returns a zero-length array.

Returns:

an array of DataFlavors in which the current contents of this clipboard can be provided

Throws:

IllegalStateException - if this clipboard is currently unavailable

Since:

1.5

isDataFlavorAvailable

public boolean isDataFlavorAvailable(DataFlavor flavor)

Returns whether or not the current contents of this clipboard can be provided in the specified DataFlavor.

Parameters:

flavor - the requested DataFlavor for the contents

Returns:

true if the current contents of this clipboard can be provided in the specified DataFlavor; false otherwise

Throws:

NullPointerException - if flavor is null

IllegalStateException - if this clipboard is currently unavailable

Since:

1.5

getData

public Object getData(DataFlavor flavor)
               throws UnsupportedFlavorException,
                      IOException

Returns an object representing the current contents of this clipboard in the specified DataFlavor. The class of the object returned is defined by the representation class of flavor.

Parameters:

flavor - the requested DataFlavor for the contents

Returns:

an object representing the current contents of this clipboard in the specified DataFlavor

Throws:

NullPointerException - if flavor is null

IllegalStateException - if this clipboard is currently unavailable

UnsupportedFlavorException - if the requested DataFlavor is not available

IOException - if the data in the requested DataFlavor can not be retrieved

Since:

1.5

See Also:

DataFlavor.getRepresentationClass()

addFlavorListener

public void addFlavorListener(FlavorListener listener)

Registers the specified FlavorListener to receive FlavorEvents from this clipboard. If listener is null, no exception is thrown and no action is performed.

Parameters:

listener - the listener to be added

Since:

1.5

See Also:

removeFlavorListener(java.awt.datatransfer.FlavorListener), getFlavorListeners(), FlavorListener, FlavorEvent

removeFlavorListener

public void removeFlavorListener(FlavorListener listener)

Removes the specified FlavorListener so that it no longer receives FlavorEvents from this Clipboard. This method performs no function, nor does it throw an exception, if the listener specified by the argument was not previously added to this Clipboard. If listener is null, no exception is thrown and no action is performed.

Parameters:

listener - the listener to be removed

Since:

1.5

See Also:

addFlavorListener(java.awt.datatransfer.FlavorListener), getFlavorListeners(), FlavorListener, FlavorEvent

getFlavorListeners

public FlavorListener[] getFlavorListeners()

Returns an array of all the FlavorListeners currently registered on this Clipboard.

Returns:

all of this clipboard's FlavorListeners or an empty array if no listeners are currently registered

Since:

1.5

See Also:

addFlavorListener(java.awt.datatransfer.FlavorListener), removeFlavorListener(java.awt.datatransfer.FlavorListener), FlavorListener, FlavorEvent