Demo chart for issue #151 - Add series with same label

xchart-demo/src/main/java/org/knowm/xchart/standalone/TestForIssue151.java

+/**
+ * Copyright 2015-2016 Knowm Inc. (http://knowm.org) and contributors.
+ * Copyright 2011-2015 Xeiam LLC (http://xeiam.com) and contributors.
+ *
+ * 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 org.knowm.xchart.standalone;
+
+import org.knowm.xchart.SwingWrapper;
+import org.knowm.xchart.XYChart;
+import org.knowm.xchart.XYChartBuilder;
+
+/**
+ * @author timmolter
+ */
+public class TestForIssue151 {
+
+  public static void main(String[] args) {
+
+    // Create Chart
+    XYChart chart = new XYChartBuilder().width(600).height(400).build();
+
+    // Customize Chart
+
+    // Series
+    double[] xData1 = new double[] { 0, 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15 };
+    double[] yData1 = new double[] { 106, 44, 26, 10, 11, 19, 25, Double.NaN, 30, 21, 36, 32, 30 };
+    double[] xData2 = new double[] { 6, 7, 8, 9, 10, 11 };
+    double[] yData2 = new double[] { 25, 54, 43, 56, 33, 30 };
+
+    chart.addSeries("A", xData1, yData1);
+    chart.addSeries("B", xData2, yData2);
+
+    new SwingWrapper<XYChart>(chart).displayChart();
+  }
+
+}