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66 lines
2.2 KiB
Java
66 lines
2.2 KiB
Java
Report File Status in Java
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import java.io.*;
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import java.util.*;
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//Report on a file's status in Java
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public class FileStatus {
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public static void main(String[] argv) throws IOException {
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// Ensure that a filename (or something) was given in argv[0]
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if (argv.length == 0) {
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System.err.println("Usage: Status filename");
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System.exit(1);
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}
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for (int i = 0; i< argv.length; i++) {
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status(argv[i]);
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}
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}
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public static void status(String fileName) throws IOException {
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System.out.println("---" + fileName + "---");
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// Construct a File object for the given file.
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File f = new File(fileName);
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// See if it actually exists
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if (!f.exists()) {
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System.out.println("file not found");
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System.out.println(); // Blank line
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return;
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}
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// Print full name
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System.out.println("Canonical name " + f.getCanonicalPath());
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// Print parent directory if possible
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String p = f.getParent();
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if (p != null) {
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System.out.println("Parent directory: " + p);
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}
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// Check if the file is readable
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if (f.canRead()) {
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System.out.println("File is readable.");
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}
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// Check if the file is writable
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if (f.canWrite()) {
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System.out.println("File is writable.");
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}
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// Report on the modification time.
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Date d = new Date();
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d.setTime(f.lastModified());
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System.out.println("Last modified " + d);
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// See if file, directory, or other. If file, print size.
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if (f.isFile()) {
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// Report on the file's size
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System.out.println("File size is " + f.length() + " bytes.");
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} else if (f.isDirectory()) {
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System.out.println("It's a directory");
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} else {
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System.out.println("I dunno! Neither a file nor a directory!");
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}
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System.out.println(); // blank line between entries
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}
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}
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