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import java.awt.Color;
import java.io.FileOutputStream;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
public class BarExample2{
public static void main(String arg[]){
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.setValue(2, "Marks", "Rahul");
dataset.setValue(7, "Marks", "Vinod");
dataset.setValue(4, "Marks", "Deepak");
dataset.setValue(9, "Marks", "Prashant");
dataset.setValue(6, "Marks", "Chandan");
JFreeChart chart = ChartFactory.createBarChart(
"BarChart using JFreeChart","Student", "Marks", dataset, PlotOrientation.VERTICAL, false,true, false);
chart.setBackgroundPaint(Color.yellow);
chart.getTitle().setPaint(Color.blue);
CategoryPlot p = chart.getCategoryPlot();
p.setRangeGridlinePaint(Color.red);
try{
/*생성한 차트를 이미지 파일로 저장하는 예를 들었지만,
출력스트림을 ServletOutputStream 으로
변경함으로써 브라우저로 출력할 수도 있다.*/
FileOutputStream fo = new FileOutputStream("BarChart.png");
ChartUtilities.writeChartAsPNG(fo, chart, 400, 400);
fo.close();
System.out.println("Chart created.");
}catch(Exception e){
System.err.println(e);
}
}
} |
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