Google's example code to upload a file to Google Docs

gistfile1.java

DocumentListEntry uploadedEntry = uploadFile("/path/to/your/file.doc", "TitleToUse");
System.out.println("Document now online @ :" + uploadedEntry.getHtmlLink().getHref());
        
public DocumentListEntry uploadFile(String filepath, String title)
    throws IOException, ServiceException  {
  File file = new File(filepath);
  DocumentListEntry newDocument = new DocumentListEntry();
  String mimeType = DocumentListEntry.MediaType.fromFileName(file.getName()).getMimeType();
  newDocument.setFile(new File(filepath), mimeType);
  newDocument.setTitle(new PlainTextConstruct(title));

  return client.insert(new URL("https://docs.google.com/feeds/documents/private/full/"), newDocument);
}