Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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. */ // Build the jar with the following commands: // // javac -cp gson-2.8.2.jar JavaAction.java // jar cvf javaAction.jar JavaAction.class import com.google.gson.JsonObject; public class JavaAction { public static JsonObject main(JsonObject args) { String text; try { text = args.getAsJsonPrimitive("text").getAsString(); } catch (Exception e) { text = "stranger"; } JsonObject response = new JsonObject(); System.out.println("Hello " + text + "!"); response.addProperty("payload", "Hello " + text + "!"); return response; } }