public static void main(String[] args) {
Comparator<DataFlavor> comparator = DataFlavorUtil.getDataFlavorComparator();
DataFlavor flavor1 = DataFlavor.imageFlavor;
DataFlavor flavor2 = DataFlavor.selectionHtmlFlavor;
if (comparator.compare(flavor1, flavor2) == 0) {
throw new RuntimeException(
flavor1.getMimeType() + " and " + flavor2.getMimeType() + " should not be equal");
}
}
/**
* 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.
*
* <p>If there is an existing owner different from the argument <code>owner</code>, that owner is
* notified that it no longer holds ownership of the clipboard contents via an invocation of
* <code>ClipboardOwner.lostOwnership()</code> on that owner. An implementation of <code>
* setContents()</code> is free not to invoke <code>lostOwnership()</code> directly from this
* method. For example, <code>lostOwnership()</code> may be invoked later on a different thread.
* The same applies to <code>FlavorListener</code>s registered on this clipboard.
*
* <p>The method throws <code>IllegalStateException</code> if the clipboard is currently
* unavailable. For example, on some platforms, the system clipboard is unavailable while it is
* accessed by another application.
*
* @param contents the transferable object representing the clipboard content
* @param owner the object which owns the clipboard content
* @throws IllegalStateException if the clipboard is currently unavailable
* @see java.awt.Toolkit#getSystemClipboard
*/
public synchronized void setContents(Transferable contents, ClipboardOwner owner) {
final ClipboardOwner oldOwner = this.owner;
final Transferable oldContents = this.contents;
this.owner = owner;
this.contents = contents;
if (oldOwner != null && oldOwner != owner) {
DataFlavorUtil.getDesktopService()
.invokeOnEventThread(() -> oldOwner.lostOwnership(Clipboard.this, oldContents));
}
fireFlavorsChanged();
}
/**
* Checks change of the <code>DataFlavor</code>s and, if necessary, notifies all listeners that
* have registered interest for notification on <code>FlavorEvent</code>s.
*
* @since 1.5
*/
private void fireFlavorsChanged() {
if (flavorListeners == null) {
return;
}
Set<DataFlavor> prevDataFlavors = currentDataFlavors;
currentDataFlavors = getAvailableDataFlavorSet();
if (Objects.equals(prevDataFlavors, currentDataFlavors)) {
return;
}
flavorListeners.forEach(
listener ->
DataFlavorUtil.getDesktopService()
.invokeOnEventThread(
() -> listener.flavorsChanged(new FlavorEvent(Clipboard.this))));
}