### Question:
BitcoinURI { public String getUser() { return (String)parameterMap.get(FIELD_USER); } BitcoinURI(String uri);  BitcoinURI(@Nullable NetworkParameters params, String input); @Nullable Address getAddress(); Coin getAmount(); String getLabel(); String getMessage(); String getUser(); final String getPaymentRequestUrl(); List<String> getPaymentRequestUrls(); Object getParameterByName(String name); @Override String toString(); static String convertToBitcoinURI(Address address, Coin amount,
                                             String label, String message); static String convertToBitcoinURI(NetworkParameters params,
                                             String address, @Nullable Coin amount,
                                             @Nullable String label, @Nullable String message); static String convertToBitcoinURI(NetworkParameters params,
                                             String address, @Nullable Coin amount,
                                             @Nullable String label, @Nullable String message,
                                             @Nullable String user); static final String FIELD_MESSAGE; static final String FIELD_LABEL; static final String FIELD_AMOUNT; static final String FIELD_ADDRESS; static final String FIELD_PAYMENT_REQUEST_URL; static final String FIELD_USER; @Deprecated
    static final String BITCOIN_SCHEME; }### Answer:
@Test public void testGood_User() throws BitcoinURIParseException { testObject = new BitcoinURI(MAINNET, BITCOIN_SCHEME + ":" + MAINNET_GOOD_ADDRESS + "?user=quantumexplorer"); assertEquals("quantumexplorer", testObject.getUser()); }