use testnet faucet to send test bitcoin to your wallet address. link: 
https://testnet.manu.backend.hamburg/faucet.

Use  below code to load wallet file and get balance:

File file = new File("195da336-a311-4f69-8707-fcfb5f61dd5a.dat");
 Wallet wallet = Wallet.loadFromFile(file);
        System.out.println(wallet.getBalance().toFriendlyString());
 
        // Set up the components and link them together.
 final NetworkParameters params = TestNet3Params.get();
 BlockStore blockStore = new MemoryBlockStore(params);
 BlockChain chain = new BlockChain(params, wallet, blockStore);


 final PeerGroup peerGroup = new PeerGroup(params, chain);
 peerGroup.setFastCatchupTimeSecs(wallet.getEarliestKeyCreationTime());
 peerGroup.startAsync();
 // Now download and process the block chain.
 peerGroup.downloadBlockChain();
        peerGroup.stopAsync();
        wallet.saveToFile(file);
        
        System.out.println("Synchronization completed");
        System.out.println(wallet.getBalance().toFriendlyString());


On Saturday, November 11, 2017 at 4:04:09 AM UTC+5:30, v e wrote:
>
> Hi,
>
> This is my first time coding using this library and looking at the 
> documentation i could able to create a wallet.
> Now I am trying to send some coins in test3network, how do load my wallet 
> with some coins programmatically?
>
> thanks
>

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