A Java library for graphene blockchains such as Hive and Bitshares. This is the core of the PalmPay Point of Sale systems. GrapheneJ can also be used for your mobile apps, embedded systems, etc.
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graphenej

A Java library for mobile app Developers; Graphene/Bitshares blockchain.

#Sample use ##Very simple funds transfer

This is a simple transfer operation of 1 BTS from account bilthon-15 to bilthon-5

// Creating a transfer operation
TransferOperation transferOperation = new TransferOperationBuilder()
        .setTransferAmount(new AssetAmount(UnsignedLong.valueOf(100000), new Asset("1.3.0")))
        .setSource(new UserAccount("1.2.143563"))       // bilthon-15
        .setDestination(new UserAccount("1.2.139313"))  // bilthon-5
        .setFee(new AssetAmount(UnsignedLong.valueOf(264174), new Asset("1.3.0")))
        .build();
        
// Adding operations to the operation list
ArrayList<BaseOperation> operationList = new ArrayList<>();
operationList.add(transferOperation);

// Creating a transaction instance
Transaction transaction = new Transaction(sourcePrivateKey, null, operationList);

From here on, it is just a matter of creating a websocket connection and using a custom handler called TransactionBroadcastSequence in order to broadcast it to the witness node.

// Setting up a secure websocket connection.
SSLContext context = null;
context = NaiveSSLContext.getInstance("TLS");
WebSocketFactory factory = new WebSocketFactory();
factory.setSSLContext(context);

WebSocket mWebSocket = factory.createSocket(FULL_NODE_URL);

mWebSocket.addListener(new TransactionBroadcastSequence(transaction, new Asset("1.3.0"), listener));
mWebSocket.connect();

The provided listener is an instance of the class WitnessResponseListener.