Java tutorial
package gwt.material.design.client.resources; /* * #%L * GwtMaterialDesign * %% * Copyright (C) 2015 GwtMaterial * %% * 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. * #L% */ import com.google.gwt.core.client.ScriptInjector; public class ResourcesLoader { public ResourcesLoader(final MaterialResources resources) { injectJQuery(resources); injectMaterializeJs(resources); } private void injectJQuery(MaterialResources resources) { if (!isjQueryLoaded()) { ScriptInjector.fromString(resources.jQuery().getText()).setWindow(ScriptInjector.TOP_WINDOW).inject(); } } private void injectMaterializeJs(MaterialResources resources) { ScriptInjector.fromString(resources.materializeJs().getText()).setWindow(ScriptInjector.TOP_WINDOW) .inject(); } /** * Check to see if jQuery is loaded already * * @return true is jQuery is loaded, false otherwise */ private native boolean isjQueryLoaded() /*-{ return (typeof $wnd['jQuery'] !== 'undefined'); }-*/; }