import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.Toolkit;
import java.io.*;
public final class TextTransfer implements ClipboardOwner {
/** Simple test harness. */
public static void main(String... args){
TextTransfer textTransfer = new TextTransfer();
//display what is currently on the clipboard
log("Clipboard contains:" + textTransfer.getClipboardContents());
//change the contents and then re-display
textTransfer.setClipboardContents("blah, blah, blah");
log("Clipboard contains:" + textTransfer.getClipboardContents());
}
/**
* Empty implementation of the ClipboardOwner interface.
*/
@Override public void lostOwnership(Clipboard clipboard, Transferable contents){
//do nothing
}
/**
* Place a String on the clipboard, and make this class the
* owner of the Clipboard's contents.
*/
public void setClipboardContents(String string){
StringSelection stringSelection = new StringSelection(string);
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
clipboard.setContents(stringSelection, this);
}
/**
* Get the String residing on the clipboard.
*
* @return any text found on the Clipboard; if none found, return an
* empty String.
*/
public String getClipboardContents() {
String result = "";
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
//odd: the Object param of getContents is not currently used
Transferable contents = clipboard.getContents(null);
boolean hasTransferableText =
(contents != null) &&
contents.isDataFlavorSupported(DataFlavor.stringFlavor)
;
if (hasTransferableText) {
try {
result = (String)contents.getTransferData(DataFlavor.stringFlavor);
}
catch (UnsupportedFlavorException | IOException ex){
System.out.println(ex);
ex.printStackTrace();
}
}
return result;
}
private static void log(String msg) {
System.out.println(msg);
}
}