import java.util.Arrays;
import org.knowm.xchart.CategoryChart;
import org.knowm.xchart.CategoryChartBuilder;
import org.knowm.xchart.SwingWrapper;
import org.knowm.xchart.style.Styler.LegendPosition;
import org.knowm.xchart.VectorGraphicsEncoder;
import org.knowm.xchart.VectorGraphicsEncoder.VectorGraphicsFormat;


/**
 * Basic Bar Chart
 *
 * <p>Demonstrates the following:
 *
 * <ul>
 *   <li>Integer categories as List
 *   <li>All positive values
 *   <li>Single series
 *   <li>Place legend at Inside-NW position
 *   <li>Bar Chart Annotations
 */


public class xchart_histo {

  public static void main(String[] args) throws Exception   {

     CategoryChart  chart = getChart("Histogram");
    new SwingWrapper(chart).displayChart();
    // Save it
    VectorGraphicsEncoder.saveVectorGraphic(chart, "Area", VectorGraphicsFormat.PDF);

}


static public CategoryChart getChart(String name) {

    // Create Chart
    CategoryChart chart =
        new CategoryChartBuilder()
            .width(600)
            .height(400)
            .title(name)
            .xAxisTitle("Score")
            .yAxisTitle("Number")
            .build();

    // Customize Chart
    chart.getStyler().setLegendPosition(LegendPosition.InsideNW);
    chart.getStyler().setLabelsVisible(false);
    chart.getStyler().setPlotGridLinesVisible(false);

    // Series
    chart.addSeries("test 1", Arrays.asList(0, 1, 2, 3, 4), Arrays.asList(4, 5, 9, 6, 5));

    return chart;
  }

}