Java Utililty Methods Decompress Byte Array

ByteArrayInputStream bis = new ByteArrayInputStream(compressedString);
GZIPInputStream gis;
StringBuilder sb = new StringBuilder();
try {
    gis = new GZIPInputStream(bis);
    BufferedReader br = new BufferedReader(new InputStreamReader(gis, "UTF-8"));
    String line;
    while ((line = br.readLine()) != null) {
...

StringBuilder stringBuilder = new StringBuilder();
try {
    GZIPInputStream gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(compressedString));
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(gzipInputStream, "UTF-8"));
    String line;
    while ((line = bufferedReader.readLine()) != null) {
        stringBuilder.append(line);
} catch (IOException e) {
    e.printStackTrace();
return stringBuilder.toString();