jdk/src/share/sample/nio/file/FileType.java
author alanb
Sun, 15 Feb 2009 12:25:54 +0000
changeset 2057 3acf8e5e2ca0
child 5506 202f599c92aa
permissions -rw-r--r--
6781363: New I/O: Update socket-channel API to jsr203/nio2-b99 4313887: New I/O: Improved filesystem interface 4607272: New I/O: Support asynchronous I/O Reviewed-by: sherman, chegar

/*
 * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.nio.file.*;
import java.nio.file.attribute.*;
import java.io.IOException;

public class FileType {
    public static void main(String[] args) throws IOException {
        if (args.length == 0) {
            System.err.println("usage: java FileType file...");
            System.exit(-1);
        }
        for (String arg: args) {
            Path file = Paths.get(arg);
            BasicFileAttributes attrs = Attributes.readBasicFileAttributes(file);

            String type;
            if (attrs.isDirectory()) {
                type = "directory";
            } else {
                type = Files.probeContentType(file);
                if (type == null)
                    type = "<not recognized>";
            }
            System.out.format("%s\t%s%n", file, type);
        }
    }
}