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. */ // START SNIPPET: hello-class package org.codehaus.mojo.gwt.test.client; import org.codehaus.mojo.gwt.test.domain.User; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.RootPanel; public class Hello implements EntryPoint { final HelloServiceAsync service = HelloServiceAsync.Util.getInstance(); public void onModuleLoad() { User user = new User(); final Label l = new Label("GWT says : " + user.sayHello()); RootPanel.get().add(l); Button b = new Button("click me !"); RootPanel.get().add(b); b.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { service.sayHello("hello", new AsyncCallback<String>() { public void onFailure(Throwable caught) { l.setText("RPC failure " + caught.getMessage()); GWT.log("RPC failure", caught); } public void onSuccess(String result) { l.setText(result); } }); } }); } } // END SNIPPET: hello-class