FileStatus.java Source code

Introduction

Here is the source code for FileStatus.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.io.File;
import java.io.IOException;
import java.util.Date;

/**
 * Report on a file's status in Java
 * 
 * @author Ian F. Darwin, http://www.darwinsys.com/
 * @version $Id: FileStatus.java,v 1.6 2004/03/11 03:25:35 ian Exp $
 */
public class FileStatus {
    public static void main(String[] argv) throws IOException {

        // Ensure that a filename (or something) was given in argv[0]
        if (argv.length == 0) {
            System.err.println("Usage: FileStatus filename");
            System.exit(1);
        }
        for (int i = 0; i < argv.length; i++) {
            status(argv[i]);
        }
    }

    public static void status(String fileName) throws IOException {
        System.out.println("---" + fileName + "---");

        // Construct a File object for the given file.
        File f = new File(fileName);

        // See if it actually exists
        if (!f.exists()) {
            System.out.println("file not found");
            System.out.println(); // Blank line
            return;
        }
        // Print full name
        System.out.println("Canonical name " + f.getCanonicalPath());
        // Print parent directory if possible
        String p = f.getParent();
        if (p != null) {
            System.out.println("Parent directory: " + p);
        }
        // Check if the file is readable
        if (f.canRead()) {
            System.out.println("File is readable.");
        }
        // Check if the file is writable
        if (f.canWrite()) {
            System.out.println("File is writable.");
        }
        // Report on the modification time.
        Date d = new Date();
        d.setTime(f.lastModified());
        System.out.println("Last modified " + d);

        // See if file, directory, or other. If file, print size.
        if (f.isFile()) {
            // Report on the file's size
            System.out.println("File size is " + f.length() + " bytes.");
        } else if (f.isDirectory()) {
            System.out.println("It's a directory");
        } else {
            System.out.println("I dunno! Neither a file nor a directory!");
        }

        System.out.println(); // blank line between entries
    }
}