home *** CD-ROM | disk | FTP | other *** search
Java Source | 1996-05-03 | 1.9 KB | 71 lines |
- /*
- * @(#)FileDescriptor.java 1.7 95/12/19 Pavani Diwanji
- *
- * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
-
- package java.io;
-
- /*
- * The FileDescriptor object serves as an opaque handle to an open
- * file or an open socket.
- * @see FileInputStream
- * @see FileOutputStream
- * @see SocketInputStream
- * @see SocketOutputStream
- * @version 1.7, 19 Dec 1995
- * @author Pavani Diwanji
- */
-
-
- public final class FileDescriptor {
-
- private int fd;
-
- /**
- * Handle to standard input.
- */
- public static final FileDescriptor in
- = initSystemFD(new FileDescriptor(),0);
-
- /**
- * Handle to standard output.
- */
- public static final FileDescriptor out
- = initSystemFD(new FileDescriptor(),1);
-
- /**
- * Handle to standard error.
- */
- public static final FileDescriptor err
- = initSystemFD(new FileDescriptor(),2);
-
- /**
- * Determines whether the file descriptor object is valid.
- */
- public native boolean valid();
-
- /**
- * This routine initializes in, out and err in a sytem dependent way.
- */
- private static native FileDescriptor initSystemFD(FileDescriptor fdObj,
- int desc);
- }
-
-
-
-
-