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‎src/main/java/com/esri/samples/displayinformation/show_labels_on_layer/README.md‎

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<h1>Show Labels on Layer</h1>
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<p>Demonstrates how to show labels on a feature layer.</p>
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<p><img src="ShowLabelsOnLayer.png"/></p>
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<h2>How it works</h2>
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<p>To show labels on a feature layer:</p>
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<ol>
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<li>First, create a <code>FeatureLayer</code> with a <code>ServiceFeatureTable</code> using an online feature
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service.</li>
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<li>Create a <code>TextSymbol</code> to use for displaying the label text.</li>
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<li>Create a JSON string for the label definition.
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<ul>
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<li> Set the "LabelExpressionInfo.expression" key to express what the text the label should display. You can
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use fields of the feature by using <code>$feature.field_name</code> in the expression.
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<li>To use the text symbol, set the "symbol" key to the symbol's JSON representation using <code>textSymbol.toJson()</code>.</li>
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</ul>
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</li>
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<li>Create a label definition from the JSON using <code>LabelDefinition.fromJson(json)</code>.</code>
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<li>Add the definition to the feature layer with <code>featureLayer.getLabelDefinitions().add(labelDefinition)
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</code>.</li>
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<li>Lastly, enable labels on the layer using <code>featureLayer.setLabelsEnabled()</code>.</li>
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</ol>
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<h2>Features</h2>
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<ul>
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<li>FeatureLayer</li>
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<li>LabelDefinition</li>
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<li>TextSymbol</li>
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</ul>

‎src/main/java/com/esri/samples/displayinformation/show_labels_on_layer/ShowLabelsOnLayer.png‎

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‎src/main/java/com/esri/samples/displayinformation/show_labels_on_layer/ShowLabelsOnLayerSample.java‎

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/*
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* Copyright 2018 Esri.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.esri.samples.displayinformation.show_labels_on_layer;
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import javafx.application.Application;
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import javafx.scene.Scene;
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import javafx.scene.control.Alert;
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import javafx.scene.layout.StackPane;
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import javafx.stage.Stage;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParser;
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import com.google.gson.JsonPrimitive;
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import com.esri.arcgisruntime.arcgisservices.LabelDefinition;
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import com.esri.arcgisruntime.data.ServiceFeatureTable;
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import com.esri.arcgisruntime.layers.FeatureLayer;
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import com.esri.arcgisruntime.loadable.LoadStatus;
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import com.esri.arcgisruntime.mapping.ArcGISMap;
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import com.esri.arcgisruntime.mapping.Basemap;
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import com.esri.arcgisruntime.mapping.view.MapView;
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import com.esri.arcgisruntime.symbology.TextSymbol;
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public class ShowLabelsOnLayerSample extends Application {
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private MapView mapView;
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@Override
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public void start(Stage stage) throws Exception {
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try {
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// create stack pane and application scene
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StackPane stackPane = new StackPane();
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Scene scene = new Scene(stackPane);
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// size the stage, add a title, and set scene to stage
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stage.setTitle("Show Labels on Layer Sample");
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stage.setHeight(700);
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stage.setWidth(800);
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stage.setScene(scene);
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stage.show();
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// create a map view and set a map
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mapView = new MapView();
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ArcGISMap map = new ArcGISMap(Basemap.createLightGrayCanvas());
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mapView.setMap(map);
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// create a feature layer from an online feature service of US Highways
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String serviceUrl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/1";
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ServiceFeatureTable serviceFeatureTable = new ServiceFeatureTable(serviceUrl);
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FeatureLayer featureLayer = new FeatureLayer(serviceFeatureTable);
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map.getOperationalLayers().add(featureLayer);
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// zoom to the layer when it's done loading
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featureLayer.addDoneLoadingListener(() -> {
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if (featureLayer.getLoadStatus() == LoadStatus.LOADED) {
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mapView.setViewpointGeometryAsync(featureLayer.getFullExtent());
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} else {
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new Alert(Alert.AlertType.ERROR, featureLayer.getLoadError().getMessage()).show();
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}
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});
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// use large blue text with a yellow halo for the labels
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TextSymbol textSymbol = new TextSymbol();
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textSymbol.setSize(20);
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textSymbol.setColor(0xFF0000FF);
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textSymbol.setHaloColor(0xFFFFFF00);
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textSymbol.setHaloWidth(2);
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// construct the label definition json
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JsonObject json = new JsonObject();
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// prepend 'I - ' (for Interstate) to the route number for the label
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JsonObject expressionInfo = new JsonObject();
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expressionInfo.add("expression", new JsonPrimitive("'I -' + $feature.rte_num1"));
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json.add("labelExpressionInfo", expressionInfo);
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// position the label above and along the direction of the road
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json.add("labelPlacement", new JsonPrimitive("esriServerLinePlacementAboveAlong"));
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// only show labels on the interstate highways (others have an empty rte_num1 attribute)
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json.add("where", new JsonPrimitive("$feature.rte_num1 <> ' '"));
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// set the text symbol as the label symbol
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json.add("symbol", new JsonParser().parse(textSymbol.toJson()));
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// create a label definition from the JSON string
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LabelDefinition labelDefinition = LabelDefinition.fromJson(json.toString());
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// add the definition to the feature layer and enable labels on it
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featureLayer.getLabelDefinitions().add(labelDefinition);
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featureLayer.setLabelsEnabled(true);
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// add the map view to stack pane
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stackPane.getChildren().add(mapView);
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} catch (Exception e) {
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// on any error, display stack trace
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e.printStackTrace();
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}
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}
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/**
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* Stops and releases all resources used in application.
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*
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* @throws Exception if security manager doesn't allow JVM to exit with
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* current status
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*/
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@Override
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public void stop() throws Exception {
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// release resources when the application closes
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if (mapView != null) {
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mapView.dispose();
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}
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}
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/**
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* Opens and runs application.
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*
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* @param args arguments passed to this application
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*/
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public static void main(String[] args) {
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Application.launch(args);
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}
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}

‎src/main/java/com/esri/samples/geometry/clip_geometry/ClipGeometry.png‎

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‎src/main/java/com/esri/samples/geometry/clip_geometry/ClipGeometrySample.java‎

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/*
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* Copyright 2018 Esri.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.esri.samples.geometry.clip_geometry;
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import javafx.application.Application;
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import javafx.geometry.Insets;
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import javafx.geometry.Pos;
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import javafx.scene.Scene;
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import javafx.scene.control.Button;
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import javafx.scene.layout.StackPane;
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import javafx.stage.Stage;
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import com.esri.arcgisruntime.geometry.Envelope;
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import com.esri.arcgisruntime.geometry.Geometry;
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import com.esri.arcgisruntime.geometry.GeometryEngine;
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import com.esri.arcgisruntime.geometry.Point;
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import com.esri.arcgisruntime.geometry.SpatialReferences;
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import com.esri.arcgisruntime.mapping.ArcGISMap;
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import com.esri.arcgisruntime.mapping.Basemap;
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import com.esri.arcgisruntime.mapping.view.Graphic;
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import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
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import com.esri.arcgisruntime.mapping.view.MapView;
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import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
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import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
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public class ClipGeometrySample extends Application {
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private MapView mapView;
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@Override
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public void start(Stage stage) {
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try {
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// create stack pane and application scene
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StackPane stackPane = new StackPane();
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Scene scene = new Scene(stackPane);
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// set title, size, and add scene to stage
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stage.setTitle("Clip Geometry Sample");
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stage.setWidth(800);
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stage.setHeight(700);
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stage.setScene(scene);
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stage.show();
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// create a map with a basemap and add it to the map view
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ArcGISMap map = new ArcGISMap(SpatialReferences.getWebMercator());
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map.setBasemap(Basemap.createTopographic());
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mapView = new MapView();
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mapView.setMap(map);
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// create a graphics overlay to contain the geometry to clip
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GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
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mapView.getGraphicsOverlays().add(graphicsOverlay);
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// create a blue graphic of Colorado
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Envelope colorado = new Envelope(new Point(-11362327.128340, 5012861.290274),
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new Point(-12138232.018408, 4441198.773776));
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SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, 0x220000FF,
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new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFF0000FF, 2));
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Graphic coloradoGraphic = new Graphic(colorado, fillSymbol);
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graphicsOverlay.getGraphics().add(coloradoGraphic);
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// create a graphics overlay to contain the clipping envelopes
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GraphicsOverlay envelopesOverlay = new GraphicsOverlay();
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mapView.getGraphicsOverlays().add(envelopesOverlay);
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// create a dotted red outline symbol
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SimpleLineSymbol redOutline = new SimpleLineSymbol(SimpleLineSymbol.Style.DOT, 0xFFFF0000, 3);
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// create a envelope outside Colorado
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Envelope outsideEnvelope =
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new Envelope(new Point(-11858344.321294, 5147942.225174), new Point(-12201990.219681, 5297071.577304));
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Graphic outside = new Graphic(outsideEnvelope, redOutline);
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envelopesOverlay.getGraphics().add(outside);
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// create a envelope intersecting Colorado
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Envelope intersectingEnvelope =
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new Envelope(new Point(-11962086.479298, 4566553.881363), new Point(-12260345.183558, 4332053.378376));
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Graphic intersecting = new Graphic(intersectingEnvelope, redOutline);
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envelopesOverlay.getGraphics().add(intersecting);
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// create a envelope inside Colorado
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Envelope containedEnvelope =
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new Envelope(new Point(-11655182.595204, 4741618.772994), new Point(-11431488.567009, 4593570.068343));
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Graphic contained = new Graphic(containedEnvelope, redOutline);
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envelopesOverlay.getGraphics().add(contained);
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// zoom to show the polygon graphic
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mapView.setViewpointGeometryAsync(coloradoGraphic.getGeometry(), 200);
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// create a graphics overlay to contain the clipped areas
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GraphicsOverlay clipAreasOverlay = new GraphicsOverlay();
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mapView.getGraphicsOverlays().add(clipAreasOverlay);
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// create a button to perform the clip operation
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Button clipButton = new Button("Clip");
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clipButton.setOnAction(e -> {
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// for each envelope, clip the Colorado geometry and show the result as a green graphic
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SimpleFillSymbol clippedAreaSymbol =
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new SimpleFillSymbol(SimpleFillSymbol.Style.DIAGONAL_CROSS, 0xFF00FF00, null);
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envelopesOverlay.getGraphics().forEach(graphic -> {
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Geometry geometry = GeometryEngine.clip(coloradoGraphic.getGeometry(), (Envelope) graphic.getGeometry());
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if (geometry != null) {
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Graphic clippedGraphic = new Graphic(geometry, clippedAreaSymbol);
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clipAreasOverlay.getGraphics().add(clippedGraphic);
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}
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});
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// only clip once
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clipButton.setDisable(true);
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});
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// add the map view to the stack pane
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stackPane.getChildren().addAll(mapView, clipButton);
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StackPane.setAlignment(clipButton, Pos.TOP_LEFT);
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StackPane.setMargin(clipButton, new Insets(10, 0, 0, 10));
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} catch (Exception e) {
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// on any error, display the stack trace.
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e.printStackTrace();
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}
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}
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/**
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* Stops and releases all resources used in application.
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*/
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@Override
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public void stop() {
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if (mapView != null) {
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mapView.dispose();
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}
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}
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/**
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* Opens and runs application.
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*
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* @param args arguments passed to this application
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*/
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public static void main(String[] args) {
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Application.launch(args);
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}
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}

‎src/main/java/com/esri/samples/geometry/clip_geometry/README.md‎

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<h1>Clip Geometry</h1>
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<p>Demonstrates how to clip a geometry with an envelope using the GeometryEngine.</p>
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<p><img src="ClipGeometry.png"/></p>
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<h2>How to use the sample</h2>
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<p>Click the "Clip" button to clip the blue graphic with each of the red envelopes and see the resulting geometries as
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green graphics.</p>
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<h2>How it works</h2>
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<p>To clip a <code>Geometry</code> with an <code>Envelope</code>:</p>
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<ol>
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<li>Use the static method <code>GeometryEngine.clip(geometry, envelope)</code>.</li>
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<li>Keep in mind that the resulting <code>Geometry</code> may be null if the envelope does not intersect the
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geometry you are clipping</li>.</code>
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</ol>
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<h2>Features</h2>
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<ul>
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<li>ArcGISMap</li>
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<li>Basemap</li>
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<li>Envelope</li>
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<li>Geometry</li>
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<li>GeometryEngine</li>
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<li>Graphic</li>
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<li>GraphicsOverlay</li>
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<li>MapView</li>
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<li>Point</li>
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<li>PointCollection</li>
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<li>Polygon</li>
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<li>Polyline</li>
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<li>SimpleFillSymbol</li>
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<li>SimpleLineSymbol</li>
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<li>SpatialReferences</li>
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</ul>

‎src/main/java/com/esri/samples/geometry/cut_geometry/CutGeometrySample.java‎

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.SOLID, 0x220000FF, new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFF0000FF, 2)));
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graphicsOverlay.getGraphics().add(polygonGraphic);
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// create a red poyline graphic to cut the polygon
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// create a red polyline graphic to cut the polygon
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Graphic polylineGraphic = new Graphic(createBorder(), new SimpleLineSymbol(SimpleLineSymbol.Style.DOT,
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0xFFFF0000, 3));
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graphicsOverlay.getGraphics().add(polylineGraphic);

‎src/main/java/com/esri/samples/geometry/densify_and_generalize/DensifyAndGeneralize.gif‎

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‎src/main/java/com/esri/samples/geometry/densify_and_generalize/DensifyAndGeneralize.png‎

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