Export string with bytes to file without encoding

Question

I stored bytes within a string in Java

String header ="00110011000000011001000000000001001011000000000100000010000000000000000000000000000000000000000000000000000000000000000000000000";

Now i want to write that String to a file, but export that as a series of bits and not encoded as a text. Writing to the file looks like this:

BufferedWriter writer = new BufferedWriter (new FileWriter("test.epd"));
writer.write(header);

How can I do this(The string in this prog will be longer --> around 8kB)

@fvu But his string is just 16bit long so he can use a variable to store the string .. In my case no variable will be long enough! As i said i need about 8kB — valentin
– valentin, Commented Oct 21, 2014 at 16:49

Xavier Delamotte · Accepted Answer · 2014-10-21 16:47:38Z

I would use BinaryCodec from commons apache commons-codec.

String headerb = "00110011000000011001000000000001001011000000000100000010000000000000000000000000000000000000000000000000000000000000000000000000";
BinaryCodec codec = new BinaryCodec();
//I have no idea why this method is not static. 
//you may  use BinaryCodec.fromAscii(ascii.toCharArray()) instead
byte[] bval = codec.toByteArray(headerb);
File file = new File("test.epd");
Files.write(bval, file );

//Test that when the file is read, we retrieve the same string
byte[] byteArray = Files.toByteArray(file);
String asciiString = BinaryCodec.toAsciiString(byteArray);
System.out.println(asciiString);

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