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Pack200

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.util.jar.JarOutputStream; import java.util.jar.Pack200; public class Main {   public static void main(String[] args) throws Exception {     Pack200.Unpacker unpacker = Pack200.newUnpacker();     JarOutputStream out = new JarOutputStream(new FileOutputStream("outName"));     InputStream in = new FileInputStream("inName");     // in = new GZIPInputStream(in);     unpacker.unpack(in, out);     out.close();   } }