import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartFactory;
import org.jfree.data.general.DefaultPieDataset;

import org.jfree.chart.ChartUtilities;
import java.io.File;
import java.io.IOException;

public class Test1_1{
  public static void main(String[] args) {
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("外食", 37);
    data.setValue("弁当", 31);
    data.setValue("食べない", 32);

    JFreeChart chart = 
      ChartFactory.createPieChart("昼食", data, false, false, false);

    System.out.println(chart.isBorderVisible());

    File file1 = new File("./test1_1.png");
    try {
      ChartUtilities.saveChartAsPNG(file1, chart, 400, 400);
    } catch (IOException e) {
      e.printStackTrace();
    }

    chart.setBorderVisible(true);
    System.out.println(chart.isBorderVisible());

    File file2 = new File("./test1_2.png");
    try {
      ChartUtilities.saveChartAsPNG(file2, chart, 400, 400);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}