AreaChart02.java

/**
 * Copyright 2015-2017 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.demo.charts.area;

import java.util.ArrayList;
import java.util.List;

import org.knowm.xchart.SwingWrapper;
import org.knowm.xchart.XYChart;
import org.knowm.xchart.XYChartBuilder;
import org.knowm.xchart.XYSeries.XYSeriesRenderStyle;
import org.knowm.xchart.demo.charts.ExampleChart;
import org.knowm.xchart.style.Styler.LegendPosition;

/**
 * Null Y-Axis Data Points
 * <p>
 * Demonstrates the following:
 * <ul>
 * <li>Area Chart
 * <li>null Y-Axis values
 * <li>ChartBuilder
 */
public class AreaChart02 implements ExampleChart<XYChart> {

  public static void main(String[] args) {

    ExampleChart<XYChart> exampleChart = new AreaChart02();
    XYChart chart = exampleChart.getChart();
    new SwingWrapper<XYChart>(chart).displayChart();
  }

  @Override
  public XYChart getChart() {

    // Create Chart
    XYChart chart = new XYChartBuilder().width(800).height(600).title(getClass().getSimpleName()).xAxisTitle("X").yAxisTitle("Y").build();

    // Customize Chart
    chart.getStyler().setDefaultSeriesRenderStyle(XYSeriesRenderStyle.Area);
    chart.getStyler().setLegendPosition(LegendPosition.InsideNW);

    // Series
    List<Integer> xData = new ArrayList<Integer>();
    List<Integer> yData = new ArrayList<Integer>();
    for (int i = 0; i < 5; i++) {
      xData.add(i);
      yData.add(i * i);
    }
    xData.add(5);
    yData.add(null);

    for (int i = 6; i < 10; i++) {
      xData.add(i);
      yData.add(i * i);
    }
    xData.add(10);
    yData.add(null);
    xData.add(11);
    yData.add(100);
    xData.add(12);
    yData.add(90);

    chart.addSeries("a", xData, yData);

    return chart;
  }
}