choose-file で初期提案ファイル名を指定したい

[wbardwell]

If you are running a privileged applet I think that you can find out the directory that it will use and generate the proper Url using your desired filename. For an unprivileged applet, it was regarded as not safe to allow providing any information about a path that you have not already gotten permission to edit (which you show by having a PrivilegedUrl for the location.) (This is because users often just hit Enter, and the idea is to make sure an applet can't try to get permission to read or write a system file.)