Length of the file , what is considered what value ?

File file = new File("newke.jpg");
          InputStream in = null;
          int length = 0;
          in = new BufferedInputStream(new FileInputStream(file));
          length = (int)file.length();

file.length () can get a length . Here is the picture , so that access to the file length is correct ? ?


If it is a text file , then the length is the number of characters or bytes it ?
------ Solution ---------------------------------------- ----
The length, in bytes, of the file denoted by this abstract pathname
bytes
------ Solution ---------------------------------- ----------

  
  /**
       * Returns the length of the file denoted by this abstract pathname.
       * The return value is unspecified if this pathname denotes a directory.
       *
       * @return  The length, in bytes, of the file denoted by this abstract
       *          pathname, or <code>0L</code> if the file does not exist.  Some
       *          operating systems may return <code>0L</code> for pathnames
       *          denoting system-dependent entities such as devices or pipes.
       *
       * @throws  SecurityException
       *          If a security manager exists and its <code>{@link
       *          java.lang.SecurityManager#checkRead(java.lang.String)}</code>
       *          method denies read access to the file
       */
      public long length() {
  	SecurityManager security = System.getSecurityManager();
  	if (security != null) {
  	    security.checkRead(path);
  	}
  	return fs.getLength(this);
      }
  

    /**
       * Return the length in bytes of the file denoted by the given abstract
       * pathname, or zero if it does not exist, is a directory, or some other
       * I/O error occurs.
       */
      public abstract long getLength(File f);
  

bytes , comments which explains .