Java Utililty Methods GZip File Check

List of utility methods to do GZip File Check

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Description

The list of methods to do GZip File Check are organized into topic(s).

Method

booleanisGzip(File file)
Gets if the file is compressed with gzip. 
try {
    RandomAccessFile raf = new RandomAccessFile(file, "r");
    int magic = raf.read() & 0xff | (raf.read() << 8) & 0xff00;
    raf.close();
    return magic == GZIPInputStream.GZIP_MAGIC;
} catch (Exception e) {
    e.printStackTrace();
return false;
booleanisGzip(String file)
is Gzip 
return isGzip(new File(file));
booleanisGZipEnding(File file)
is G Zip Ending 
return endsWith(file, ".gz");
booleanisGzipFile(File f)
is Gzip File 
FileInputStream fis = null;
try {
    fis = new FileInputStream(f);
    GZIPInputStream gs = new GZIPInputStream(fis);
} catch (FileNotFoundException e) {
    return false;
} catch (IOException e) {
    return false;
...
booleanisGZipFile(File file)
is G Zip File 
boolean rv = false;
if (file != null) {
    String fileName = file.getName();
    if (fileName != null) {
        if (fileName.toLowerCase().endsWith(".gz")) {
            rv = true;
return rv;
booleanisGzipFile(File file)
Returns true if the input file is a gzip file. 
return hasCaseInsensitiveSuffix(file, gz_suffix) || hasCaseInsensitiveSuffix(file, tgz_suffix);
booleanisGZIPFileEmpty(File f)
is GZIP File Empty 
InputStream in = new GZIPInputStream(new FileInputStream(f));
try {
    return in.read() == -1;
} finally {
    in.close();
booleanisGzipFilename(File file)
is Gzip Filename 
return isGzipFilename(file.getName());
booleanisGzipped(File f)
is Gzipped 
InputStream is = null;
try {
    is = new FileInputStream(f);
    byte[] signature = new byte[2];
    int nread = is.read(signature); 
    return nread == 2 && signature[0] == (byte) 0x1f && signature[1] == (byte) 0x8b;
} catch (IOException e) {
    return false;
...
booleanisGzipped(File file)
Returns true if file has a .gz extension 
return file.getName().endsWith(".gz");