How to get Sender Address and Receive Address in BitcoinJ

[Minh Le Quang]

I'm create app with BitcoinJ lib. I have several address and I send them to 
my Friends, when my friend send money to me I don't know who is he. 
So I want to know what is sender bitcoin address and what is receive 
bitcoin address.
I'm using this code to detect the address but it alway show all my bitcoin 
address in my wallet. 

public void onCoinsReceived(Wallet w, Transaction tx, Coin prevBalance, 
Coin newBalance) {


          List<TransactionInput> inputs = tx.getInputs();

    List<TransactionOutput> outputs = tx.getOutputs();

    for(TransactionOutput out : outputs){
        System.out.println(out.getAddressFromP2PKHScript(params));
        System.out.println(out.getAddressFromP2SH(params));
    }

    for(TransactionInput in : inputs){
        System.out.println(in.getFromAddress());
    }

}

Please give me a advise.

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