package ctbrec.ui.controls; import java.io.File; public class FileSelectionBox extends AbstractFileSelectionBox { public FileSelectionBox() { } public FileSelectionBox(String initialValue) { super(initialValue); } @Override protected String validate(File file) { if (isDisabled()) { return null; } String msg = super.validate(file); if (msg != null) { return msg; } else if (!file.isFile()) { return "This is not a regular file"; } else { return null; } } }