How to write data to two java.io.OutputStream objects at once?

Question

I\'m looking for magical Java class that will allow me to do something like this:

ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
FileOutputS         


        

Answer 1

final ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
final FileOutputStream fileStream = new FileOutputStream(new File("/tmp/somefile"));
OutputStream outStream = new OutputStream() {

    public void write(int b) throws IOException {
        byteStream.write(b);
        fileStream.write(b);
    }
};
outStream.write("Hello world".getBytes());