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Java includes an undocumented class, sun.misc.BASE64Decoder, for handling Base64 decoding. The following gives an example of its usage.

String encoded = getEncodedStringFromSomewhere();

// Create encoder

BASE64Decoder decoder = new BASE64Decoder();

// Decode encoded string into original byte array

byte[] decoded = decoder = decoder.decodeBuffer(encoded);

written by objects \\ tags: Base64, decoding, string