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import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.jar.JarOutputStream;
import java.util.jar.Pack200;
import java.util.zip.GZIPInputStream;
public class Main {
public static void main(String[] args) throws Exception {
String inName = args[0];
String outName;
if (inName.endsWith(".pack.gz")) {
outName = inName.substring(0, inName.length() - 8);
} else if (inName.endsWith(".pack")) {
outName = inName.substring(0, inName.length() - 5);
} else {
outName = inName + ".unpacked";
}
JarOutputStream out = null;
InputStream in = null;
Pack200.Unpacker unpacker = Pack200.newUnpacker();
out = new JarOutputStream(new FileOutputStream(outName));
in = new FileInputStream(inName);
if (inName.endsWith(".gz"))
in = new GZIPInputStream(in);
unpacker.unpack(in, out);
out.close();
}
}
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