| URLConnection | A class to represent an active connection to an object represented by a URL. | code | html |
| ApplicationLaunchException | An exception thrown by the MimeLauncher when it is unable to launch an external content viewer. | code | html |
| HeaderParser | code | html | |
| HeaderParser.ParserIterator | code | html | |
| MessageHeader | An RFC 844 or MIME message header. | code | html |
| MessageHeader.HeaderIterator | code | html | |
| MeteredStream | code | html | |
| MimeEntry | code | html | |
| MimeLauncher | code | html | |
| MimeTable | code | html | |
| MimeTable.DefaultInstanceHolder | code | html | |
| ParseUtil | A class that contains useful routines common to sun.net.www | code | html |