Needs["JLink`"]
ShowJavaClipboard[] :=
JavaBlock @ Module[{toolkit, clipboard, flavors}
, LoadJavaClass["java.awt.Toolkit"]
; toolkit = java`awt`Toolkit`getDefaultToolkit[]
; clipboard = toolkit @ getSystemClipboard[]
; flavors = clipboard @ getAvailableDataFlavors[]
; Grid[
{ #@getHumanPresentableName[]
, OpenerView[
{ #@getMimeType[]
, clipboard@getData[#] /. v:Except[Null, _?JavaObjectQ] :> Style[v@toString[], Italic]
}
]
} &/@ flavors