Generate oAuth key in ..

Java

public String computeHmac(String baseString, String key)     throws NoSuchAlgorithmException, InvalidKeyException, IllegalStateException, UnsupportedEncodingException {     Mac mac = Mac.getInstance("HmacSHA1");     SecretKeySpec secret = new SecretKeySpec(key.getBytes(), mac.getAlgorithm());     mac.init(secret);     byte[] digest = mac.doFinal(baseString.getBytes());     return Base64.encode(digest); }
or

MessageDigest digest = MessageDigest.getInstance("SHA-1");
			digest.reset();
			byte[] hash = digest.digest(body.getBytes("UTF-8"));
			String encodedHash = Base64.encode(hash);

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