Bug 272616 GB18030: 4-byte GB18030 displayed as ? in SWT Clipboard RTFTransfer.
examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/clipboard/ClipboardExample.java
public void widgetSelected(SelectionEvent e) {
			String data = (String)clipboard.getContents(HTMLTransfer.getInstance());
			if (data != null && data.length() > 0) {
				status.setText("");
				pasteHtmlText.setText("start paste>"+data+"<end paste");
			} else {
				status.setText("nothing to paste");
			}
		}
	});
}
void createFileTransfer(Composite copyParent, Composite pasteParent){
	
	Label l = new Label(copyParent, SWT.NONE);
	l.setText("FileTransfer:"); 
	
	Composite c = new Composite(copyParent, SWT.NONE);
	c.setLayout(new GridLayout(2, false));
	GridData data = new GridData(GridData.FILL_HORIZONTAL);
	c.setLayoutData(data);
	
	final Table copyFileTable = new Table(c, SWT.MULTI | SWT.BORDER);
	data = new GridData(GridData.FILL_HORIZONTAL);
	data.heightHint = data.widthHint = SIZE;
	data.horizontalSpan = 2;
	copyFileTable.setLayoutData(data);
	
	Button b = new Button(c, SWT.PUSH);
	b.setText("Select file(s)");
	b.addSelectionListener(new SelectionAdapter() {