if (data != null) {                return data;            }        }         data = readZoneInfoFile(JAVAZM_FILE_NAME);         if (data == null) {            return null;        }         int index;        for (index = 0; index < JAVAZM_LABEL.length; index++) {            if (data[index] != JAVAZM_LABEL[index]) {                System.err.println("ZoneInfo: wrong magic number: " + JAVAZM_FILE_NAME);                return null;            }        }        if (data[index++] > JAVAZM_VERSION) {            System.err.println("ZoneInfo: incompatible version ("                               + data[index - 1] + "): " + JAVAZM_FILE_NAME);            return null;        }         zoneInfoMappings = new SoftReference<byte[]>(data);        return data;    }     /**     * Reads the specified file under &lt;java.home&gt;/lib/zi into a buffer.     * @return the buffer, or null if any I/O error occurred.     */    private static byte[] readZoneInfoFile(final String fileName) {        byte[] buffer = null;         try {            buffer = (byte[]) AccessController.doPrivileged(new PrivilegedExceptionAction() {                public Object run() throws IOException {                    File file = new File(ziDir, fileName);                    if (!file.exists() || !file.isFile()) {                        return null;                    }                    file = file.getCanonicalFile();                    String path = file.getCanonicalPath();                    byte[] buf = null;                    if (path != null && path.startsWith(ziDir)) {                        int filesize = (int)file.length();                        if (filesize > 0) {                            FileInputStream fis = new FileInputStream(file);                            buf = new byte[filesize];                            try {                                if (fis.read(buf) != filesize) {                                    throw new IOException("read error on " + fileName);                                }                            } finally {                                fis.close();                            }                        }                    }                    return buf;                }            });        } catch (PrivilegedActionException e) {            Exception ex = e.getException();            if (!(ex instanceof FileNotFoundException) || JAVAZM_FILE_NAME.equals(fileName)) {                System.err.println("ZoneInfo: " + ex.getMessage());            }        }        return buffer;    }}

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