import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartFactory;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.xy.XYSeries;

import javax.swing.JFrame;
import java.awt.BorderLayout;
import org.jfree.chart.ChartPanel;

public class Test2_1 extends JFrame{
  public static void main(String[] args) {
    Test2_1 frame = new Test2_1();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 500, 500);
    frame.setTitle("グラフサンプル");
    frame.setVisible(true);
  }

  Test2_1(){
    JFreeChart chart = 
      ChartFactory.createScatterPlot("来店者傾向",
                                     "気温",
                                     "人数",
                                     createData(),
                                     PlotOrientation.VERTICAL, 
                                     true, 
                                     false, 
                                     false);

    ChartPanel cpanel = new ChartPanel(chart);
    getContentPane().add(cpanel, BorderLayout.CENTER);
  }

  private XYSeriesCollection createData(){
    XYSeriesCollection data = new XYSeriesCollection();

    int xdata[] = {10, 15, 20, 22, 24, 26,  4,  8, 28, 30, 25, 12, 33};
    int ydata[] = {26, 42, 54, 56, 52, 58, 20, 24, 51, 49, 54, 38, 44};

    XYSeries series = new XYSeries("動物園");

    for (int i = 0 ; i < 13 ; i++){
      series.add(xdata[i], ydata[i]);
    }

    data.addSeries(series);

    return data;
  }
}