String query = "key="+key;
query += "&";
query += "nonce="+nonce;
query += "&";
query += "signature="+signature;

SSLContext sslctx = SSLContext.getInstance("SSL");
sslctx.init(null, null, null);

HttpsURLConnection.setDefaultSSLSocketFactory(sslctx.getSocketFactory());

URL url = new URL("https://www.bitstamp.net/api/balance/");

HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setDoOutput(true);

PrintStream ps = new PrintStream(con.getOutputStream());
ps.println(query);
ps.close();
con.connect();

if (con.getResponseCode() == HttpsURLConnection.HTTP_OK) {
BufferedReader br = new BufferedReader(new
InputStreamReader(con.getInputStream()));
String text;
while((text = br.readLine()) != null) {
json += text;
}
br.close();
}else{
;
}
con.disconnect();
System.out.println("Code Response: " + con.getResponseCode());