add jcompute java sample.

jcompute-java/src/com/google/cloud/api/example/VerificationCodeReceiver.java

Index: jcompute-java/src/com/google/cloud/api/example/VerificationCodeReceiver.java 
diff --git a/jcompute-java/src/com/google/cloud/api/example/VerificationCodeReceiver.java b/jcompute-java/src/com/google/cloud/api/example/VerificationCodeReceiver.java 
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..2eed5ebfbc07cfe5e5dc9f3db958b6078078e385 100644 
--- a/jcompute-java/src/com/google/cloud/api/example/VerificationCodeReceiver.java 
+++ b/jcompute-java/src/com/google/cloud/api/example/VerificationCodeReceiver.java 
@@ -0,0 +1,32 @@ 
+/* 
+ * Copyright (c) 2011 Google Inc. 
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 
+ * in compliance with the License. You may obtain a copy of the License at 
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0 
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License 
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 
+ * or implied. See the License for the specific language governing permissions and limitations under 
+ * the License. 
+ */ 
+ 
+package com.google.cloud.api.example; 
+ 
+/** 
+ * Verification code receiver. 
+ * 
+ * @author Yaniv Inbar 
+ */ 
+public interface VerificationCodeReceiver { 
+ 
+ /** Returns the redirect URI. */ 
+ String getRedirectUri() throws Exception; 
+ 
+ /** Waits for a verification code. */ 
+ String waitForCode(); 
+ 
+ /** Releases any resources and stops any processes started. */ 
+ void stop() throws Exception; 
+}