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<TITLE>Compressing a Byte Array
(Java Developers Almanac Example)
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<h3>
e449.
Compressing a Byte Array</h3>
See also <a href="../java.util.zip/DecompArray.html" class="eglink"><font size="-1"><b>e450</b> Decompressing a Byte Array</font></a>.
<pre>
byte[] input = <font color="#0066ff"><i>"some some bytes to compress"</i></font>.getBytes();
// Create the compressor with highest level of compression
Deflater compressor = new Deflater();
compressor.setLevel(Deflater.BEST_COMPRESSION);
// Give the compressor the data to compress
compressor.setInput(input);
compressor.finish();
// Create an expandable byte array to hold the compressed data.
// You cannot use an array that's the same size as the orginal because
// there is no guarantee that the compressed data will be smaller than
// the uncompressed data.
ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);
// Compress the data
byte[] buf = new byte[<font color="#0066ff"><i>1024</i></font>];
while (!compressor.finished()) {
int count = compressor.deflate(buf);
bos.write(buf, 0, count);
}
try {
bos.close();
} catch (IOException e) {
}
// Get the compressed data
byte[] compressedData = bos.toByteArray();
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Related Examples
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e450. <a class="eglink" href="DecompArray.html?l=rel">
Decompressing a Byte Array
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See also:
<a class="eglink" href="/egs/java.util.zip/pkg.html?l=rel#Checksums">
Checksums
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<a class="eglink" href="/egs/java.util.zip/pkg.html?l=rel#GZIP">
GZIP
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<a class="eglink" href="/egs/java.util.zip/pkg.html?l=rel#ZIP">
ZIP
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