Module java.datatransfer
Package java.awt.datatransfer

Class Clipboard

java.lang.Object
java.awt.datatransfer.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)).

Since:
1.1
See Also:
Toolkit.getSystemClipboard(), Toolkit.getSystemSelection()

  • Field Details

  • Constructor Details

  • Method Details

    • getName

      public String getName()
      Returns the name of this clipboard object.
      Returns:
      the name of this clipboard object
      See Also:
      Toolkit.getSystemClipboard()

    • setContents

      public void setContents​(Transferable contents, ClipboardOwner owner)
      Sets the current contents of the clipboard to the specified transferable object and registers the specified clipboard owner as the owner of the new contents.

      If there is an existing owner different from the argument owner, that owner is notified that it no longer holds ownership of the clipboard contents via an invocation of ClipboardOwner.lostOwnership() on that owner. An implementation of setContents() is free not to invoke lostOwnership() directly from this method. For example, lostOwnership() may be invoked later on a different thread. The same applies to FlavorListeners registered on this clipboard.

      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:
      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