Java File.length Exemples

Exemple #1

Fichier : class Playground.java Projet : rushingseas8/Playground

 private byte[] loadClassData(String className) throws IOException {
   Playground.println("Loading class " + className + ".class", warning);
   File f = new File(System.getProperty("user.dir") + "/" + className + ".class");
   byte[] b = new byte[(int) f.length()];
   new FileInputStream(f).read(b);
   return b;
 }

Exemple #2

Fichier : Decipher.java Projet : johnperry/MIRC1

 void getTable() {
   if (chooser == null) {
     File userdir = new File(System.getProperty("user.dir"));
     chooser = new JFileChooser(userdir);
   }
   if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
     file = chooser.getSelectedFile();
     fileLength = file.length();
     setTitle(windowTitle + ": " + file.getAbsolutePath());
     int size = Key.getEncryptionKeySize(this, true);
     key = Key.getEncryptionKey(this, true, size);
     if (key == null) key = defaultKey;
     initCipher();
   } else System.exit(0);
 }

Exemple #3

Fichier : BackupHdfs.java Projet : TAwarehouse/backup-hadoop-and-hive

  /**
   * Compare the checksums of the hdfs file as well as the local copied file.
   *
   * @author [email protected]
   * @date Fri Jan 27 06:06:00 2012
   */
  boolean compareChecksums(FileSystem fs, Path p, String sFsPath) {
    try {
      // get hdfs file info
      FileStatus stat = fs.getFileStatus(p);

      // get HDFS checksum
      FileChecksum ck = fs.getFileChecksum(p);
      String sCk, sCkShort;
      if (ck == null) {
        sCk = sCkShort = "<null>";
      } else {
        sCk = ck.toString();
        sCkShort = sCk.replaceAll("^.*:", "");
      }

      // System.out.println(p.toUri().getPath() + " len=" + stat.getLen()
      // + " " + stat.getOwner() + "/" + stat.getGroup()
      // + " checksum=" + sCk);

      // find the local file
      File fLocal = new File(sFsPath);
      if (!fLocal.exists()) {
        System.out.println("CHECKSUM-ERROR: file does not exist: " + sFsPath);
        return false;
      }
      if (!fLocal.isFile()) {
        System.out.println("CHECKSUM-ERROR: path is not a file: " + sFsPath);
        return false;
      }
      if (stat.getLen() != fLocal.length()) {
        System.out.println(
            "CHECKSUM-ERROR: length mismatch: "
                + sFsPath
                + " hdfslen="
                + stat.getLen()
                + " fslen="
                + fLocal.length());
        return false;
      }

      // get local fs checksum
      FileChecksum ckLocal = getLocalFileChecksum(sFsPath);
      if (ckLocal == null) {
        System.out.println("ERROR Failed to get checksum for local file " + sFsPath);
        return false;
      }

      // compare checksums as a string, after stripping the
      // algorithm name from the beginning
      String sCkLocal = ckLocal.toString();
      String sCkLocalShort = sCkLocal.replaceAll("^.*:", "");

      if (false == sCkShort.equals(sCkLocalShort)) {
        System.out.println(
            "CHECKSUM-ERROR: checksum mismatch: "
                + sFsPath
                + "\nhdfs = "
                + sCk
                + "\nlocal= "
                + sCkLocal);
        return false;
      }

      return true;
    } catch (IOException e) {
      System.out.println("CHECKSUM-ERROR: " + sFsPath + " exception " + e.toString());
    }

    return false;
  }