Java clipboard owner purpose?

• Java

I wrote a Java application that copies strings to the system clipboard Constructor use

Clipboard.setContents(Transferable contents,ClipboardOwner owner)

http://docs.oracle.com/javase/6/docs/api/java/awt/datatransfer/Clipboard.html

My work is normal, but I'm not sure what clipboard owner does? Look, the Java API doesn't really tell much

http://docs.oracle.com/javase/6/docs/api/java/awt/datatransfer/ClipboardOwner.html

Oddly enough, even passing clippboardowner = null is OK So I'm not sure what the point is? Does anyone have an idea?

Solution

If your application or one of its components implements the clipboard owner interface in an appropriate way, it can show you that users copy some data from another application or another component of your own application to the system clipboard

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