It supports FTP using its own FTP API and various other protocols like SMB, SFTP, NFS, HTTP, and file I/O using third party APIs, includes many advanced features such as recursive directory up/download, browsing FTP servers while transferring files, FTP resuming and queueing, browsing the LAN for Windows shares, and more.
You can also have more than one connection open at a time in a mozilla-style tabbed browsing environment. The FTP API is separated from the GUI and can also be used in third-party applications.
It should ideally be launched in a Web browser via Java Web Start (contained by the Java 1.4 plugin), but can also be started locally.
JFtp is free and distributed under the GNU public license. The API is dual licensed, you may use it under the GPL in your project or negotiate with me about a commercial license.URL: http://j-ftp.sourceforge.net/