samples: Add Translate API quickstart sample.

Author: jmdobry

translate/snippets/src/main/java/com/example/translate/QuickstartSample.java

@@ -0,0 +1,42 @@
+/*
+  Copyright 2016, 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.example.translate;
+
+// [START translate_quickstart]
+// Imports the Google Cloud client library
+import com.google.cloud.translate.Translate;
+import com.google.cloud.translate.Translate.TranslateOption;
+import com.google.cloud.translate.TranslateOptions;
+import com.google.cloud.translate.Translation;
+
+public class QuickstartSample {
+  public static void main(String... args) throws Exception {
+    // Instantiates a client
+    Translate translate = TranslateOptions.builder().apiKey("YOUR_API_KEY").build().service();
+    // The text to translate
+    String text = "Hello, world!";
+    // Translates some text into Russian
+    Translation translation = translate.translate(
+      text,
+      TranslateOption.sourceLanguage("en"),
+      TranslateOption.targetLanguage("ru")
+    );
+    System.out.printf("Text: %s%n", text);
+    System.out.printf("Translation: %s%n", translation.translatedText());
+  }
+}
+// [END translate_quickstart]