Report on a file's status in Java
/*
* 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
}
}
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