FileStatus

package dummy;

import java.io.*;
import java.util.*;
/**
* Report on a file's status in Java
*/
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
}
}