<pre><code>public static void main(String[] args) {
    NetworkParameters params = TestNet3Params.get();
    String filePrefix = "peer2-testnet";
    WalletAppKit kit = new WalletAppKit(params, new File("."), filePrefix);
    // Download the block chain and wait until it's done.
    kit.startAsync();
    kit.awaitRunning();
    String ads = "n1XZMMm3ikh97Mr8JVnnahfugad2DRcVrB";
    Address address = new Address(params, ads);
    Wallet wallet = new Wallet(params);
    wallet.addWatchedAddress(address, 0);
    System.out.println("wallet.getWatchedAddresses()"+wallet.getWatchedAddresses());
    BlockChain chain;
    try {
        chain = new BlockChain(params, wallet,
               new MemoryBlockStore(params));

    PeerGroup peerGroup = new PeerGroup(params, chain);
    peerGroup.addPeerDiscovery(new DnsDiscovery(params));
    peerGroup.addWallet(wallet);
    peerGroup.start();
    peerGroup.downloadBlockChain();
    Coin balance = wallet.getBalance();
    System.out.println("Wallet balance: " + balance);
    } catch (BlockStoreException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
</code></pre>

<p>I tired this one and it worked but  each and every  time it is taking time to download the blockchian</p>

CC BY-SA 3.0
2017-08-07T09:39:12.980Z
2017-08-07T09:39:12.980Z
sano143
<p>I found the solution for this question. I used this class: </p>

<pre><code>/**
 * This class implements a {@link org.bitcoinj.wallet.CoinSelector} which attempts to select all outputs
 * from a designated address. Outputs are selected in order of highest priority.  Note that this means we may 
 * end up "spending" more priority than would be required to get the transaction we are creating confirmed.
 */

public class AddressBalance implements CoinSelector {

    private Address addressToQuery;

    public AddressBalance(Address addressToQuery) {
        this.addressToQuery = addressToQuery;
    }

    @Override
    public CoinSelection select(Coin biTarget, List&lt;TransactionOutput&gt; candidates) {
        long target = biTarget.longValue();
        HashSet&lt;TransactionOutput&gt; selected = new HashSet&lt;TransactionOutput&gt;();
        // Sort the inputs by age*value so we get the highest "coindays" spent.
        // TODO: Consider changing the wallets internal format to track just outputs and keep them ordered.
        ArrayList&lt;TransactionOutput&gt; sortedOutputs = new ArrayList&lt;TransactionOutput&gt;(candidates);
        // When calculating the wallet balance, we may be asked to select all possible coins, if so, avoid sorting
        // them in order to improve performance.
        if (!biTarget.equals(NetworkParameters.MAX_MONEY)) {
            sortOutputs(sortedOutputs);
        }
        // Now iterate over the sorted outputs until we have got as close to the target as possible or a little
        // bit over (excessive value will be change).
        long totalOutputValue = 0;
        for (TransactionOutput output : sortedOutputs) {
            if (totalOutputValue &gt;= target) break;
            // Only pick chain-included transactions, or transactions that are ours and pending.
            if (!shouldSelect(output)) continue;
            selected.add(output);
            totalOutputValue += output.getValue().longValue();
         }
        // Total may be lower than target here, if the given candidates were insufficient to create to requested
        // transaction.
        return new CoinSelection(Coin.valueOf(totalOutputValue), selected);
    }

    static void sortOutputs(ArrayList&lt;TransactionOutput&gt; outputs) {
        Collections.sort(outputs, new Comparator&lt;TransactionOutput&gt;() {
            public int compare(TransactionOutput a, TransactionOutput b) {
                int depth1 = 0;
                int depth2 = 0;
                TransactionConfidence conf1 = a.getParentTransaction().getConfidence();
                TransactionConfidence conf2 = b.getParentTransaction().getConfidence();
                if (conf1.getConfidenceType() == TransactionConfidence.ConfidenceType.BUILDING)
                    depth1 = conf1.getDepthInBlocks();
                if (conf2.getConfidenceType() == TransactionConfidence.ConfidenceType.BUILDING)
                    depth2 = conf2.getDepthInBlocks();
                Coin aValue = a.getValue();
                Coin bValue = b.getValue();
                BigInteger aCoinDepth = BigInteger.valueOf(aValue.value).multiply(BigInteger.valueOf(depth1));
                BigInteger bCoinDepth = BigInteger.valueOf(bValue.value).multiply(BigInteger.valueOf(depth2));
                int c1 = bCoinDepth.compareTo(aCoinDepth);
                if (c1 != 0) return c1;
                // The "coin*days" destroyed are equal, sort by value alone to get the lowest transaction size.
                int c2 = bValue.compareTo(aValue);
                if (c2 != 0) return c2;
                // They are entirely equivalent (possibly pending) so sort by hash to ensure a total ordering.
                BigInteger aHash = a.getParentTransaction().getHash().toBigInteger();
                BigInteger bHash = b.getParentTransaction().getHash().toBigInteger();
                return aHash.compareTo(bHash);
            }
        });
    }

    /** Sub-classes can override this to just customize whether transactions are usable, but keep age sorting. */
    protected boolean shouldSelect(TransactionOutput output) {
        Address outputToAddress = output.getScriptPubKey().getToAddress(addressToQuery.getParameters());
        try {
            // Check if output address matches addressToQuery and check if it can be spent.
            if(outputToAddress.equals(addressToQuery)) {
                if(output.isAvailableForSpending()) {
                    return isSelectable(output.getParentTransaction());
                }
            }
         } catch (Exception e) {
            e.printStackTrace();
         }

         return false;
    }

    public static boolean isSelectable(Transaction tx) {
        // Only pick chain-included transactions, or transactions that are ours and pending.
        TransactionConfidence confidence = tx.getConfidence();
        TransactionConfidence.ConfidenceType type = confidence.getConfidenceType();
        return type.equals(TransactionConfidence.ConfidenceType.BUILDING) || type.equals(TransactionConfidence.ConfidenceType.PENDING) &amp;&amp; confidence.getSource().equals(TransactionConfidence.Source.SELF) &amp;&amp; confidence.numBroadcastPeers() &gt; 1;
    }
}
</code></pre>

<p>EDIT: Use <code>Wallet.getBalance(CoinSelector)</code>. Example: </p>

<pre><code>Coin addressBalance = wallet.getBalance(new AddressBalance(myBtcAddress));
</code></pre>

CC BY-SA 3.0
2016-02-21T14:09:33.060Z
How do you use such code ? Don't see any method Coin getBalance(Address a)
Pavel Niedoba
CC BY-SA 3.0
2016-02-22T00:40:31.927Z
@PavelNiedoba use `Wallet.getBalance(CoinSelector)`. Example:
`Coin addressBalance = wallet.getBalance(new AddressBalance(myBtcAddress));`
Ander Acosta
CC BY-SA 4.0
2021-07-02T06:12:31.613Z
Seems this is not useful anymore. Always returns 0.0 balance all the time at the year 2021 with the bitcoinj-core 0.15.10
Lakshitha Kanchana
CC BY-SA 3.0
2016-02-04T01:51:46.590Z
2016-02-22T00:45:11.057Z
2016-02-22T00:45:11.057Z
Ander Acosta
<p>I'm trying to get the balance of a specific address in a wallet by using <a href="https://github.com/bitcoinj/bitcoinj" rel="noreferrer">bitcoinj</a>, but I don't know how. Can someone help me? Thanks in advance!!</p>

CC BY-SA 3.0
2015-12-21T13:48:52.427Z
This has been flagged as "Unclear what you’re asking", can somebody explain why? I don’t know enough about bitcoinj to be certain whether it would be useful to the asker’s issue.
Murch
CC BY-SA 3.0
2016-02-21T14:07:54.600Z
this is very clear and usefull question
Pavel Niedoba
<address><bitcoinj><balance>
How to get balance from a specific address in bitcoinj?
Ander Acosta
# How to get balance from a specific address in bitcoinj?

(Asked by: username_0 on 2015-08-03)

I'm trying to get the balance of a specific address in a wallet by using [bitcoinj](https://github.com/bitcoinj/bitcoinj), but I don't know how. Can someone help me? Thanks in advance!!

**Tags:** address, bitcoinj, balance

> **Comments:**
> **username_1**: This has been flagged as "Unclear what you’re asking", can somebody explain why? I don’t know enough about bitcoinj to be certain whether it would be useful to the asker’s issue.  
> **username_2**: this is very clear and usefull question  

---

## 2 answers

### Answer by username_0 on 2016-02-04. Score: 4 | Accepted answer

I found the solution for this question. I used this class: 
/**
 * This class implements a {@link org.bitcoinj.wallet.CoinSelector} which attempts to select all outputs
 * from a designated address. Outputs are selected in order of highest priority.  Note that this means we may 
 * end up "spending" more priority than would be required to get the transaction we are creating confirmed.
 */

public class AddressBalance implements CoinSelector {

    private Address addressToQuery;

    public AddressBalance(Address addressToQuery) {
        this.addressToQuery = addressToQuery;
    }

    @Override
    public CoinSelection select(Coin biTarget, List candidates) {
        long target = biTarget.longValue();
        HashSet selected = new HashSet();
        // Sort the inputs by age*value so we get the highest "coindays" spent.
        // TODO: Consider changing the wallets internal format to track just outputs and keep them ordered.
        ArrayList sortedOutputs = new ArrayList(candidates);
        // When calculating the wallet balance, we may be asked to select all possible coins, if so, avoid sorting
        // them in order to improve performance.
        if (!biTarget.equals(NetworkParameters.MAX_MONEY)) {
            sortOutputs(sortedOutputs);
        }
        // Now iterate over the sorted outputs until we have got as close to the target as possible or a little
        // bit over (excessive value will be change).
        long totalOutputValue = 0;
        for (TransactionOutput output : sortedOutputs) {
            if (totalOutputValue >= target) break;
            // Only pick chain-included transactions, or transactions that are ours and pending.
            if (!shouldSelect(output)) continue;
            selected.add(output);
            totalOutputValue += output.getValue().longValue();
         }
        // Total may be lower than target here, if the given candidates were insufficient to create to requested
        // transaction.
        return new CoinSelection(Coin.valueOf(totalOutputValue), selected);
    }

    static void sortOutputs(ArrayList outputs) {
        Collections.sort(outputs, new Comparator() {
            public int compare(TransactionOutput a, TransactionOutput b) {
                int depth1 = 0;
                int depth2 = 0;
                TransactionConfidence conf1 = a.getParentTransaction().getConfidence();
                TransactionConfidence conf2 = b.getParentTransaction().getConfidence();
                if (conf1.getConfidenceType() == TransactionConfidence.ConfidenceType.BUILDING)
                    depth1 = conf1.getDepthInBlocks();
                if (conf2.getConfidenceType() == TransactionConfidence.ConfidenceType.BUILDING)
                    depth2 = conf2.getDepthInBlocks();
                Coin aValue = a.getValue();
                Coin bValue = b.getValue();
                BigInteger aCoinDepth = BigInteger.valueOf(aValue.value).multiply(BigInteger.valueOf(depth1));
                BigInteger bCoinDepth = BigInteger.valueOf(bValue.value).multiply(BigInteger.valueOf(depth2));
                int c1 = bCoinDepth.compareTo(aCoinDepth);
                if (c1 != 0) return c1;
                // The "coin*days" destroyed are equal, sort by value alone to get the lowest transaction size.
                int c2 = bValue.compareTo(aValue);
                if (c2 != 0) return c2;
                // They are entirely equivalent (possibly pending) so sort by hash to ensure a total ordering.
                BigInteger aHash = a.getParentTransaction().getHash().toBigInteger();
                BigInteger bHash = b.getParentTransaction().getHash().toBigInteger();
                return aHash.compareTo(bHash);
            }
        });
    }

    /** Sub-classes can override this to just customize whether transactions are usable, but keep age sorting. */
    protected boolean shouldSelect(TransactionOutput output) {
        Address outputToAddress = output.getScriptPubKey().getToAddress(addressToQuery.getParameters());
        try {
            // Check if output address matches addressToQuery and check if it can be spent.
            if(outputToAddress.equals(addressToQuery)) {
                if(output.isAvailableForSpending()) {
                    return isSelectable(output.getParentTransaction());
                }
            }
         } catch (Exception e) {
            e.printStackTrace();
         }

         return false;
    }

    public static boolean isSelectable(Transaction tx) {
        // Only pick chain-included transactions, or transactions that are ours and pending.
        TransactionConfidence confidence = tx.getConfidence();
        TransactionConfidence.ConfidenceType type = confidence.getConfidenceType();
        return type.equals(TransactionConfidence.ConfidenceType.BUILDING) || type.equals(TransactionConfidence.ConfidenceType.PENDING) && confidence.getSource().equals(TransactionConfidence.Source.SELF) && confidence.numBroadcastPeers() > 1;
    }
}

EDIT: Use Wallet.getBalance(CoinSelector). Example: 
Coin addressBalance = wallet.getBalance(new AddressBalance(myBtcAddress));

> **Comments:**
> **username_2**: How do you use such code ? Don't see any method Coin getBalance(Address a)  
> **username_0**: @PavelNiedoba use `Wallet.getBalance(CoinSelector)`. Example: `Coin addressBalance = wallet.getBalance(new AddressBalance(myBtcAddress));`  
> **username_4**: Seems this is not useful anymore. Always returns 0.0 balance all the time at the year 2021 with the bitcoinj-core 0.15.10  

---

### Answer by username_3 on 2017-08-07. Score: 1

public static void main(String[] args) {
    NetworkParameters params = TestNet3Params.get();
    String filePrefix = "peer2-testnet";
    WalletAppKit kit = new WalletAppKit(params, new File("."), filePrefix);
    // Download the block chain and wait until it's done.
    kit.startAsync();
    kit.awaitRunning();
    String ads = "n1XZMMm3ikh97Mr8JVnnahfugad2DRcVrB";
    Address address = new Address(params, ads);
    Wallet wallet = new Wallet(params);
    wallet.addWatchedAddress(address, 0);
    System.out.println("wallet.getWatchedAddresses()"+wallet.getWatchedAddresses());
    BlockChain chain;
    try {
        chain = new BlockChain(params, wallet,
               new MemoryBlockStore(params));

    PeerGroup peerGroup = new PeerGroup(params, chain);
    peerGroup.addPeerDiscovery(new DnsDiscovery(params));
    peerGroup.addWallet(wallet);
    peerGroup.start();
    peerGroup.downloadBlockChain();
    Coin balance = wallet.getBalance();
    System.out.println("Wallet balance: " + balance);
    } catch (BlockStoreException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

I tired this one and it worked but  each and every  time it is taking time to download the blockchian


---

