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java代码画法 java如何用代码画圆( 二 )

IT技术设置


* java.lang.String title, 设置图表的标题
* java.lang.String categoryAxisLabel, 设置分类轴的标示
* java.lang.String valueAxisLabel, 设置值轴的标示
* CategoryDataset dataset, 设置数据
* PlotOrientation orientation, 设置图表的方向
* boolean legend, 设置是否显示图例
* boolean tooltips,设置是否生成热点工具
* boolean urls) 设置是否显示url
*/
JFreeChart chart = ChartFactory.createBarChart3D("编程语言统计", "语言",
"学习人数", dataset, PlotOrientation.VERTICAL, true, false,
false);
//保存图表
ChartUtilities.saveChartAsPNG(new File("E:/chart/BarChart3D.png"), chart, 800, 500);
System.out.println("绘图完成");
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
===================================================================================
//一条线 有点 有数
package Test;
import java.awt.Color;
import java.awt.Font;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisSpace;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardXYItemLabelGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;
public class try123 {
public static void main(String[] args){
//首先构造数据
TimeSeries timeSeries = new TimeSeries("BMI", Month.class);
// 时间曲线数据集合
TimeSeriesCollection lineDataset = new TimeSeriesCollection();
// 构造数据集合
timeSeries.add(new Month(1, 2009), 45);
timeSeries.add(new Month(2, 2009), 46);
timeSeries.add(new Month(3, 2009), 1);
timeSeries.add(new Month(4, 2009), 500);
timeSeries.add(new Month(5, 2009), 43);
timeSeries.add(new Month(6, 2009), 324);
timeSeries.add(new Month(7, 2009), 632);
timeSeries.add(new Month(8, 2009), 34);
timeSeries.add(new Month(9, 2009), 12);
timeSeries.add(new Month(10, 2009), 543);
timeSeries.add(new Month(11, 2009), 32);
timeSeries.add(new Month(12, 2009), 225);
lineDataset.addSeries(timeSeries);
JFreeChart chart = ChartFactory.createTimeSeriesChart("", "date", "bmi", lineDataset, true, true, true);
//增加标题
chart.setTitle(new TextTitle("XXXBMI指数", new Font("隶书", Font.ITALIC, 15)));
chart.setAntiAlias(true);
XYPlot plot = (XYPlot) chart.getPlot();
plot.setAxisOffset(new RectangleInsets(10,10,10,10));//图片区与坐标轴的距离
plot.setOutlinePaint(Color.PINK);
plot.setInsets(new RectangleInsets(15,15,15,15));//坐标轴与最外延的距离
// plot.setOrientation(PlotOrientation.HORIZONTAL);//图形的方向，包括坐标轴 。
AxisSpace as = new AxisSpace();
as.setLeft(25);
as.setRight(25);
plot.setFixedRangeAxisSpace(as);
chart.setPadding(new RectangleInsets(5,5,5,5));
chart.setNotify(true);
// 设置曲线是否显示数据点
XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)plot.getRenderer();
xylineandshaperenderer.setBaseShapesVisible(true);
// 设置曲线显示各数据点的值
XYItemRenderer xyitem = plot.getRenderer();
xyitem.setBaseItemLabelsVisible(true);
xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.INSIDE10, TextAnchor.BASELINE_LEFT));

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