...
<repository>
  <id>Open Whisper Systems Maven</id>
  <url>https://github.com/whispersystems/maven</url>
  <snapshots>
    <enabled>true</enabled>
    <updatePolicy>always</updatePolicy>
  </snapshots>
</repository>
...
<dependency>
  <groupId>com.stripe</groupId>
  <artifactId>stripe-java-btc</artifactId>
  <version>1.12.0-btc-beta</version>
</dependency>

import java.util.HashMap;
import java.util.Map;

import com.stripe.Stripe;
import com.stripe.exception.StripeException;
import com.stripe.model.Charge;

public class StripeExample {

    public static void main(String[] args) {
        Stripe.apiKey = "YOUR-SECRET-KEY";
        Map<String, Object> chargeMap = new HashMap<String, Object>();
        chargeMap.put("amount", 100);
        chargeMap.put("currency", "usd");
        Map<String, Object> cardMap = new HashMap<String, Object>();
        cardMap.put("number", "4242424242424242");
        cardMap.put("exp_month", 12);
        cardMap.put("exp_year", 2020);
        chargeMap.put("card", cardMap);
        try {
            Charge charge = Charge.create(chargeMap);
            System.out.println(charge);
        } catch (StripeException e) {
            e.printStackTrace();
        }
    }
}