Example usage for java.io File lastModified

List of usage examples for java.io File lastModified

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Introduction

In this page you can find the example usage for java.io File lastModified.

Prototype

public long lastModified()

Source Link

Document

Returns the time that the file denoted by this abstract pathname was last modified.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File f = new File("name.txt");

    if (!f.exists()) {
        System.out.println("File not found.");
        return;/*from   ww  w  .j  a v a2s .  co  m*/
    }
    if (f.canRead())
        System.out.println("  Readable");
    else
        System.out.println("  Not Readable");

    if (f.canWrite())
        System.out.println("  Writable");
    else
        System.out.println("  Not Writable");
    System.out.println("  Last modified on " + new Date(f.lastModified()));

    long t = Calendar.getInstance().getTimeInMillis();
    if (!f.setLastModified(t))
        System.out.println("Can't set time.");

    if (!f.setReadOnly())
        System.out.println("Can't set to read-only.");

    if (f.canRead())
        System.out.println("  Readable");
    else
        System.out.println("  Not Readable");

    if (f.canWrite())
        System.out.println("  Writable");
    else
        System.out.println("  Not Writable");
    System.out.println("  Last modified on " + new Date(f.lastModified()));

    if (!f.setWritable(true, false))
        System.out.println("Can't return to read/write.");

    if (f.canRead())
        System.out.println("  Readable");
    else
        System.out.println("  Not Readable");

    if (f.canWrite())
        System.out.println("  Writable");
    else
        System.out.println("  Not Writable");
}

From source file:de.uniwue.dmir.heatmap.EntryPointIncremental.java

@SuppressWarnings({ "rawtypes", "unchecked" })
public static void main(String[] args) throws IOException, ParseException {

    DateFormat df = new SimpleDateFormat(DATE_FORMAT);
    SimpleDateFormat backupDf = new SimpleDateFormat(BACKUP_DATE_FORMAT);

    String workDir = System.getProperty("workDir", ".");
    LOGGER.debug("Work dir: {}", workDir);
    String configDir = System.getProperty("configDir", ".");
    LOGGER.debug("Config dir: {}", configDir);

    File seedDir = new File(workDir, SEED_DIR);
    LOGGER.debug("Seed dir: {}", seedDir);
    File currentDir = new File(workDir, CURRENT_DIR);
    LOGGER.debug("Current dir: {}", currentDir);
    File backupDir = new File(workDir, BACKUP_DIR);
    LOGGER.debug("Backup dir: {}", backupDir);

    String initialMinTimeString = System.getProperty("minTime");
    LOGGER.debug("Initial minimal time parameter: {}", initialMinTimeString);
    Date initialMinTime = initialMinTimeString == null ? new Date(0) : df.parse(initialMinTimeString);
    LOGGER.debug("Initial minimal time: {}", df.format(initialMinTime));

    String absoluteMaxTimeString = System.getProperty("maxTime");
    LOGGER.debug("Absolute maximal time parameter: {}", absoluteMaxTimeString);
    Date absoluteMaxTime = absoluteMaxTimeString == null ? new Date()
            : new SimpleDateFormat(DATE_FORMAT).parse(absoluteMaxTimeString);
    LOGGER.debug("Absolute maximal time: {}", df.format(absoluteMaxTime));

    String incrementalFile = new File("file:" + configDir, INCREMENTAL_FILE).getPath();
    String settingsFile = new File("file:" + configDir, HEATMAP_PROCESSOR__FILE).getPath();

    LOGGER.debug("Initializing incremental control file: {}", incrementalFile);
    FileSystemXmlApplicationContext incrementalContext = new FileSystemXmlApplicationContext(incrementalFile);

    // get point limit
    int pointLimit = Integer
            .parseInt(incrementalContext.getBeanFactory().resolveEmbeddedValue("${point.limit}"));
    LOGGER.debug("Print limit: {}", pointLimit);

    // get backups to keep
    int backupsToKeep = Integer
            .parseInt(incrementalContext.getBeanFactory().resolveEmbeddedValue("${backups.to.keep}"));
    LOGGER.debug("Backups to keep: {}", pointLimit);

    LOGGER.debug("Initializing process components (manager and limiter).");
    IProcessManager processManager = incrementalContext.getBean(IProcessManager.class);
    IProcessLimiter processLimiter = incrementalContext.getBean(IProcessLimiter.class);

    LOGGER.debug("Starting incremental loop.");
    while (true) { // break as soon as no new points are available

        // cleanup --- just in case
        LOGGER.debug("Deleting \"current\" dir.");
        FileUtils.deleteDirectory(currentDir);

        // copy from seed to current
        LOGGER.debug("Copying seed.");
        seedDir.mkdirs();//  ww  w  . j  a  v  a2s .c  o  m
        FileUtils.copyDirectory(seedDir, currentDir);

        // get min time
        LOGGER.debug("Getting minimal time ...");
        Date minTime = initialMinTime;
        ProcessManagerEntry entry = processManager.getEntry();
        if (entry != null && entry.getMaxTime() != null) {
            minTime = entry.getMaxTime();
        }
        LOGGER.debug("Minimal time: {}", new SimpleDateFormat(DATE_FORMAT).format(minTime));

        // break if we processed all available points (minTime is greater than or equal to absoluteMaxTime)
        if (minTime.getTime() >= absoluteMaxTime.getTime()) {
            LOGGER.debug("Processed all points.");
            break;
        }

        // get the maximal time
        LOGGER.debug("Get maximal time.");

        // get the time from the newest point in our point range (pointMaxTime) ...
        Date pointMaxTime = processLimiter.getMaxTime(minTime, pointLimit);

        // ... and possibly break the loop if no new points are available
        if (pointMaxTime == null)
            break;

        // set the max time and make sure we are not taking to many points 
        // (set max time to the minimum of pointMaxTime and absoluteMaxTime)
        Date maxTime = pointMaxTime.getTime() > absoluteMaxTime.getTime() ? absoluteMaxTime : pointMaxTime;

        LOGGER.debug("Maximal time: {}", new SimpleDateFormat(DATE_FORMAT).format(maxTime));

        // start process
        processManager.start(minTime);

        System.setProperty("minTimestamp", new SimpleDateFormat(DATE_FORMAT).format(minTime));

        System.setProperty("maxTimestamp", new SimpleDateFormat(DATE_FORMAT).format(maxTime));

        FileSystemXmlApplicationContext heatmapContext = new FileSystemXmlApplicationContext(settingsFile);

        IHeatmap heatmap = heatmapContext.getBean(HEATMAP_BEAN, IHeatmap.class);

        ITileProcessor tileProcessor = heatmapContext.getBean(WRITER_BEAN, ITileProcessor.class);

        heatmap.processTiles(tileProcessor);

        tileProcessor.close();
        heatmapContext.close();

        // finish process
        processManager.finish(maxTime);

        // move old seed
        if (backupsToKeep > 0) {
            FileUtils.moveDirectory(seedDir, new File(backupDir, backupDf.format(minTime))); // minTime is the maxTime of the seed

            // cleanup backups
            String[] backups = backupDir.list(DirectoryFileFilter.DIRECTORY);
            File oldestBackup = null;
            if (backups.length > backupsToKeep) {
                for (String bs : backups) {
                    File b = new File(backupDir, bs);
                    if (oldestBackup == null || oldestBackup.lastModified() > b.lastModified()) {
                        oldestBackup = b;
                    }
                }
                FileUtils.deleteDirectory(oldestBackup);
            }

        } else {
            FileUtils.deleteDirectory(seedDir);
        }

        // move new seed
        FileUtils.moveDirectory(currentDir, seedDir);

    }

    incrementalContext.close();

}

From source file:MainClass.java

public static void main(String args[]) {
    File f1 = new File("MainClass.java");
    System.out.println("File Name:" + f1.getName());
    System.out.println("Path:" + f1.getPath());
    System.out.println("Abs Path:" + f1.getAbsolutePath());
    System.out.println("Parent:" + f1.getParent());
    System.out.println(f1.exists() ? "exists" : "does not exist");
    System.out.println(f1.canWrite() ? "is writeable" : "is not writeable");
    System.out.println(f1.canRead() ? "is readable" : "is not readable");
    System.out.println("is a directory" + f1.isDirectory());
    System.out.println(f1.isFile() ? "is normal file" : "might be a named pipe");
    System.out.println(f1.isAbsolute() ? "is absolute" : "is not absolute");
    System.out.println("File last modified:" + f1.lastModified());
    System.out.println("File size:" + f1.length() + " Bytes");
}

From source file:FileDemo.java

public static void main(String args[]) {
    File f1 = new File("/java/COPYRIGHT");
    System.out.println("File Name: " + f1.getName());
    System.out.println("Path: " + f1.getPath());
    System.out.println("Abs Path: " + f1.getAbsolutePath());
    System.out.println("Parent: " + f1.getParent());
    System.out.println(f1.exists() ? "exists" : "does not exist");
    System.out.println(f1.canWrite() ? "is writeable" : "is not writeable");
    System.out.println(f1.canRead() ? "is readable" : "is not readable");
    System.out.println("is " + (f1.isDirectory() ? "" : "not" + " a directory"));
    System.out.println(f1.isFile() ? "is normal file" : "might be a named pipe");
    System.out.println(f1.isAbsolute() ? "is absolute" : "is not absolute");
    System.out.println("File last modified: " + f1.lastModified());
    System.out.println("File size: " + f1.length() + " Bytes");
}

From source file:net.sf.firemox.xml.XmlConfiguration.java

/**
 * <ul>/*from w  ww . j ava2  s  .  c om*/
 * 2 modes:
 * <li>Update the a MDB for specified TBS against the XML files (main file,
 * cards and fragments). Arguments are : TBS_NAME</li>
 * <li>Rebuild completely the MDB for specified TBS. Arguments are : -full
 * TBS_NAME</li>
 * </ul>
 * 
 * @param args
 *          main arguments.
 */
public static void main(String... args) {
    options = new Options();
    final CmdLineParser parser = new CmdLineParser(options);
    try {
        parser.parseArgument(args);
    } catch (CmdLineException e) {
        // Display help
        info(e.getMessage());
        parser.setUsageWidth(80);
        parser.printUsage(System.out);
        System.exit(-1);
        return;
    }

    if (options.isVersion()) {
        // Display version
        info("Version is " + IdConst.VERSION);
        System.exit(-1);
        return;
    }

    if (options.isHelp()) {
        // Display help
        parser.setUsageWidth(80);
        parser.printUsage(System.out);
        System.exit(-1);
        return;
    }

    warning = 0;
    uncompleted = 0;
    error = 0;
    long start = System.currentTimeMillis();
    XmlTools.initHashMaps();
    MToolKit.tbsName = options.getMdb();
    String xmlFile = MToolKit.getFile(IdConst.TBS_DIR + "/" + MToolKit.tbsName + ".xml", false)
            .getAbsolutePath();
    try {
        if (options.isForce()) {
            final File recycledDir = MToolKit.getTbsFile("recycled");
            if (!recycledDir.exists() || !recycledDir.isDirectory()) {
                recycledDir.mkdir();
            }

            parseRules(xmlFile, MToolKit.getTbsFile("recycled").getAbsolutePath(),
                    new FileOutputStream(MToolKit.getTbsFile(MToolKit.tbsName + ".mdb", false)));
        } else {
            // Check the up-to-date state of MDB
            final File file = MToolKit
                    .getFile(IdConst.TBS_DIR + "/" + MToolKit.tbsName + "/" + MToolKit.tbsName + ".mdb");
            final long lastModifiedMdb;
            if (file == null) {
                lastModifiedMdb = 0;
            } else {
                lastModifiedMdb = file.lastModified();
            }
            boolean update = false;
            // Check the up-to-date state of MDB against the main XML file
            if (MToolKit.getFile(xmlFile).lastModified() > lastModifiedMdb) {
                // The main XML file is newer than MDB
                System.out.println("MDB is out of date, " + xmlFile + " is newer");
                update = true;
            } else {
                final File fragmentDir = MToolKit.getTbsFile("");
                for (File frament : fragmentDir.listFiles(
                        (FilenameFilter) FileFilterUtils.andFileFilter(FileFilterUtils.suffixFileFilter("xml"),
                                FileFilterUtils.prefixFileFilter("fragment-")))) {
                    if (frament.lastModified() > lastModifiedMdb) {
                        // One card is newer than MDB
                        System.out.println(
                                "MDB is out of date, at least one fragment found : " + frament.getName());
                        update = true;
                        break;
                    }
                }
                if (!update) {
                    // Check the up-to-date state of MDB against the cards
                    final File recycledDir = MToolKit.getTbsFile("recycled");
                    if (!recycledDir.exists() || !recycledDir.isDirectory()) {
                        recycledDir.mkdir();
                    }
                    if (recycledDir.lastModified() > lastModifiedMdb) {
                        // The recycled XML file is newer than MDB
                        System.out.println("MDB is out of date, the recycled directory is new");
                        update = true;
                    } else {
                        for (File card : recycledDir.listFiles((FilenameFilter) FileFilterUtils.andFileFilter(
                                FileFilterUtils.suffixFileFilter("xml"), FileFilterUtils.notFileFilter(
                                        FileFilterUtils.suffixFileFilter(IdConst.FILE_DATABASE_SAVED))))) {
                            if (card.lastModified() > lastModifiedMdb) {
                                // One card is newer than MDB
                                System.out.println("MDB is out of date, at least one new card found : " + card);
                                update = true;
                                break;
                            }
                        }
                    }
                }
            }
            if (!update) {
                return;
            }
            // Need to update the whole MDB
            parseRules(xmlFile, MToolKit.getTbsFile("recycled").getAbsolutePath(),
                    new FileOutputStream(MToolKit.getTbsFile(MToolKit.tbsName + ".mdb", false)));
        }
    } catch (SAXParseException e) {
        // Ignore this error
    } catch (Exception e) {
        e.printStackTrace();
    }
    if (warning > 0) {
        System.out.println("\t" + warning + " warning" + (warning > 1 ? "s" : ""));
    }
    if (error > 0) {
        System.out.println("\t" + error + " error" + (error > 1 ? "s" : ""));
        System.out.println("Some cards have not been built correctly. Fix them.");
    } else {
        System.out.println("\tSuccessfull build");
    }
    System.out.println("\tTime : " + (System.currentTimeMillis() - start) / 1000 + " s");
}

From source file:au.com.jwatmuff.eventmanager.Main.java

/**
 * Main method./*from w w  w. j av  a  2  s.  c  o m*/
 */
public static void main(String args[]) {
    LogUtils.setupUncaughtExceptionHandler();

    /* Set timeout for RMI connections - TODO: move to external file */
    System.setProperty("sun.rmi.transport.tcp.handshakeTimeout", "2000");
    updateRmiHostName();

    /*
     * Set up menu bar for Mac
     */
    System.setProperty("apple.laf.useScreenMenuBar", "true");
    System.setProperty("com.apple.mrj.application.apple.menu.about.name", "Event Manager");

    /*
     * Set look and feel to 'system' style
     */
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (Exception e) {
        log.info("Failed to set system look and feel");
    }

    /*
     * Set workingDir to a writable folder for storing competitions, settings etc.
     */
    String applicationData = System.getenv("APPDATA");
    if (applicationData != null) {
        workingDir = new File(applicationData, "EventManager");
        if (workingDir.exists() || workingDir.mkdirs()) {
            // redirect logging to writable folder
            LogUtils.reconfigureFileAppenders("log4j.properties", workingDir);
        } else {
            workingDir = new File(".");
        }
    }

    // log version for debugging
    log.info("Running version: " + VISIBLE_VERSION + " (Internal: " + VERSION + ")");

    /*
     * Copy license if necessary
     */
    File license1 = new File("license.lic");
    File license2 = new File(workingDir, "license.lic");
    if (license1.exists() && !license2.exists()) {
        try {
            FileUtils.copyFile(license1, license2);
        } catch (IOException e) {
            log.warn("Failed to copy license from " + license1 + " to " + license2, e);
        }
    }
    if (license1.exists() && license2.exists()) {
        if (license1.lastModified() > license2.lastModified()) {
            try {
                FileUtils.copyFile(license1, license2);
            } catch (IOException e) {
                log.warn("Failed to copy license from " + license1 + " to " + license2, e);
            }
        }
    }

    /*
     * Check if run lock exists, if so ask user if it is ok to continue
     */
    if (!obtainRunLock(false)) {
        int response = JOptionPane.showConfirmDialog(null,
                "Unable to obtain run-lock.\nPlease ensure that no other instances of EventManager are running before continuing.\nDo you wish to continue?",
                "Run-lock detected", JOptionPane.YES_NO_OPTION);
        if (response == JOptionPane.YES_OPTION)
            obtainRunLock(true);
        else
            System.exit(0);
    }

    try {
        LoadWindow loadWindow = new LoadWindow();
        loadWindow.setVisible(true);

        loadWindow.addMessage("Reading settings..");

        /*
         * Read properties from file
         */
        final Properties props = new Properties();
        try {
            Properties defaultProps = PropertiesLoaderUtils
                    .loadProperties(new ClassPathResource("eventmanager.properties"));
            props.putAll(defaultProps);
        } catch (IOException ex) {
            log.error(ex);
        }

        props.putAll(System.getProperties());

        File databaseStore = new File(workingDir, "comps");
        int rmiPort = Integer.parseInt(props.getProperty("eventmanager.rmi.port"));

        loadWindow.addMessage("Loading Peer Manager..");
        log.info("Loading Peer Manager");

        ManualDiscoveryService manualDiscoveryService = new ManualDiscoveryService();
        JmDNSRMIPeerManager peerManager = new JmDNSRMIPeerManager(rmiPort, new File(workingDir, "peerid.dat"));
        peerManager.addDiscoveryService(manualDiscoveryService);

        monitorNetworkInterfaceChanges(peerManager);

        loadWindow.addMessage("Loading Database Manager..");
        log.info("Loading Database Manager");

        DatabaseManager databaseManager = new SQLiteDatabaseManager(databaseStore, peerManager);
        LicenseManager licenseManager = new LicenseManager(workingDir);

        loadWindow.addMessage("Loading Load Competition Dialog..");
        log.info("Loading Load Competition Dialog");

        LoadCompetitionWindow loadCompetitionWindow = new LoadCompetitionWindow(databaseManager, licenseManager,
                peerManager);
        loadCompetitionWindow.setTitle(WINDOW_TITLE);

        loadWindow.dispose();
        log.info("Starting Load Competition Dialog");

        while (true) {
            // reset permission checker to use our license
            licenseManager.updatePermissionChecker();

            GUIUtils.runModalJFrame(loadCompetitionWindow);

            if (loadCompetitionWindow.getSuccess()) {
                DatabaseInfo info = loadCompetitionWindow.getSelectedDatabaseInfo();

                if (!databaseManager.checkLock(info.id)) {
                    String message = "EventManager did not shut down correctly the last time this competition was open. To avoid potential data corruption, you are advised to take the following steps:\n"
                            + "1) Do NOT open this competition\n" + "2) Create a backup of this competition\n"
                            + "3) Delete the competition from this computer\n"
                            + "4) If possible, reload this competition from another computer on the network\n"
                            + "5) Alternatively, you may manually load the backup onto all computers on the network, ensuring the 'Preserve competition ID' option is checked.";
                    String title = "WARNING: Potential Data Corruption Detected";

                    int status = JOptionPane.showOptionDialog(null, message, title, JOptionPane.YES_NO_OPTION,
                            JOptionPane.ERROR_MESSAGE, null,
                            new Object[] { "Cancel (recommended)", "Open anyway" }, "Cancel (recommended)");

                    if (status == 0)
                        continue; // return to load competition window
                }

                SynchronizingWindow syncWindow = new SynchronizingWindow();
                syncWindow.setVisible(true);
                long t = System.nanoTime();
                DistributedDatabase database = databaseManager.activateDatabase(info.id, info.passwordHash);
                long dt = System.nanoTime() - t;
                log.debug(String.format("Initial sync in %dms",
                        TimeUnit.MILLISECONDS.convert(dt, TimeUnit.NANOSECONDS)));
                syncWindow.dispose();

                if (loadCompetitionWindow.isNewDatabase()) {
                    GregorianCalendar calendar = new GregorianCalendar();
                    Date today = calendar.getTime();
                    calendar.set(Calendar.MONTH, Calendar.DECEMBER);
                    calendar.set(Calendar.DAY_OF_MONTH, 31);
                    Date endOfYear = new java.sql.Date(calendar.getTimeInMillis());

                    CompetitionInfo ci = new CompetitionInfo();
                    ci.setName(info.name);
                    ci.setStartDate(today);
                    ci.setEndDate(today);
                    ci.setAgeThresholdDate(endOfYear);
                    //ci.setPasswordHash(info.passwordHash);
                    License license = licenseManager.getLicense();
                    if (license != null) {
                        ci.setLicenseName(license.getName());
                        ci.setLicenseType(license.getType().toString());
                        ci.setLicenseContact(license.getContactPhoneNumber());
                    }
                    database.add(ci);
                }

                // Set PermissionChecker to use database's license type
                String competitionLicenseType = database.get(CompetitionInfo.class, null).getLicenseType();
                PermissionChecker.setLicenseType(LicenseType.valueOf(competitionLicenseType));

                TransactionNotifier notifier = new TransactionNotifier();
                database.setListener(notifier);

                MainWindow mainWindow = new MainWindow();
                mainWindow.setDatabase(database);
                mainWindow.setNotifier(notifier);
                mainWindow.setPeerManager(peerManager);
                mainWindow.setLicenseManager(licenseManager);
                mainWindow.setManualDiscoveryService(manualDiscoveryService);
                mainWindow.setTitle(WINDOW_TITLE);
                mainWindow.afterPropertiesSet();

                TestUtil.setActivatedDatabase(database);

                // show main window (modally)
                GUIUtils.runModalJFrame(mainWindow);

                // shutdown procedures

                // System.exit();

                database.shutdown();
                databaseManager.deactivateDatabase(1500);

                if (mainWindow.getDeleteOnExit()) {
                    for (File file : info.localDirectory.listFiles())
                        if (!file.isDirectory())
                            file.delete();
                    info.localDirectory.deleteOnExit();
                }
            } else {
                // This can cause an RuntimeException - Peer is disconnected
                peerManager.stop();
                System.exit(0);
            }
        }
    } catch (Throwable e) {
        log.error("Error in main function", e);
        String message = e.getMessage();
        if (message == null)
            message = "";
        if (message.length() > 100)
            message = message.substring(0, 97) + "...";
        GUIUtils.displayError(null,
                "An unexpected error has occured.\n\n" + e.getClass().getSimpleName() + "\n" + message);
        System.exit(0);
    }
}

From source file:IndexService.IndexServer.java

public static void main(String[] args) {
    File stop = new File("/tmp/.indexstop");
    File running = new File("/tmp/.indexrunning");
    if (args != null && args.length > 0 && args[0].equals("stop")) {
        try {/*from w  w  w  .j  a v a2 s.c  om*/
            stop.createNewFile();
            running.delete();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return;
    }

    if (running.exists() && (System.currentTimeMillis() - running.lastModified() < 15000)) {
        long time = running.lastModified();
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        if (running.lastModified() == time) {
            running.delete();
        } else {
            return;
        }
    }

    if (stop.exists()) {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        if (stop.exists())
            stop.delete();
    }

    Configuration conf = new Configuration();
    IndexServer server = new IndexServer(conf);
    if (args != null && args.length > 0 && args[0].equals("test")) {
        server.testmode = true;
    }
    server.start();
    try {
        running.createNewFile();
    } catch (IOException e) {
        e.printStackTrace();
    }
    new UserCmdProc(server).start();

    while (true) {
        stop = new File("/tmp/.indexstop");
        if (stop.exists()) {
            server.close();
            running.delete();
            stop.delete();
            break;
        }
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e1) {
            e1.printStackTrace();
        }

        running.setLastModified(System.currentTimeMillis());

    }
}

From source file:Main.java

private static void cleanDir(File dir) {

    File[] files = dir.listFiles();

    for (File file : files) {
        if (file.lastModified() + 1000 < System.currentTimeMillis()) { //more than a day old
            file.delete();//from   w w  w .ja v a 2 s .c o m
        }
    }
}

From source file:Main.java

public static long getApplicationTime(Context context, PackageInfo info) {
    String dir = info.applicationInfo.publicSourceDir;
    File apkFile = new File(dir);
    return apkFile.lastModified();
}

From source file:Main.java

public static long getFileTime(String dir, String fileName) {
    File file = new File(dir, fileName);
    return file.lastModified();
}