TransferHandlerでHyperlinkをブラウザにドロップ

String href = "https://ateraimemo.com/";
// DataFlavor uriflavor = new DataFlavor(String.class, "text/uri-list");
DataFlavor uriflavor = DataFlavor.stringFlavor;
JButton b = new JButton(href);
b.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
b.setTransferHandler(new TransferHandler("text") {
  @Override public boolean canImport(JComponent c, DataFlavor[] flavors) {
    return flavors.length > 0 && flavors[0].equals(uriflavor);
  }

  @Override public Transferable createTransferable(JComponent c) {
    return new Transferable() {
      @Override public Object getTransferData(DataFlavor flavor) {
        // System.out.println(flavor.getMimeType());
        return href;
      }

      @Override public DataFlavor[] getTransferDataFlavors() {
        return new DataFlavor[] {uriflavor};
      }

      @Override public boolean isDataFlavorSupported(DataFlavor flavor) {
        return flavor.equals(uriflavor);
      }
    };
  }
});
b.addMouseListener(new MouseAdapter() {
  @Override public void mousePressed(MouseEvent e) {
    JButton button = (JButton) e.getSource();
    TransferHandler handler = button.getTransferHandler();
    handler.exportAsDrag(button, e, TransferHandler.COPY);
  }
});