How do I check a balance of a Bitcoin address (any, not necessarily mine), let's say in a Java application (or any other language)?
I need a functionality like the one on blockchain.info or biteasy.com but I don't want to use their API. Bitcoin is open source, so I thought maybe it won't be so difficult to get the data myself?
Use blockexplorer.com model and piggy back off their server or run your own using open source version at github.com/lirazsiri/blockexplorer