如何绘制柱状椭圆？

Question

1、用Jfreechart，请参考：
http://asp2.6to23.com/sentom/list.asp?id=10

Answer 1

String title = "柱状图测试";
String domain = "单位比较";
String range = "数值";
//CategoryDataset data = DemoDatasetFactory.createCategoryDataset();
DefaultCategoryDataset data = new DefaultCategoryDataset();
for (int r = 0; r < 5; r++) {
  String rowKey = "单位 [" + (r + 1)+"]" ;
  //第一层循环：分析对象
  for (int c = 0; c < 6; c++) {
    //第二层循环：分析对象在时间点上的数据
    String columnKey = "2001年" + (c + 1) + "月";
    data.addValue(new Double(r * c + 5), rowKey, columnKey);
  }
}JFreeChart chart = ChartFactory.createVerticalBarChart(title,domain,range,data,true,true,false);
// then customise it a little...
chart.setBackgroundPaint(new GradientPaint(0, 0, Color.white, 1000, 0, Color.red));
chart.setTitle(new TextTitle(title, new Font("隶书", Font.ITALIC, 15)));
CategoryPlot plot = (CategoryPlot)chart.getPlot();
plot.setForegroundAlpha(0.9f);
plot.setValueLabelFont(new Font("黑体", Font.TRUETYPE_FONT, 12));
//plot.setSectionLabelFont(new Font("黑体", Font.TRUETYPE_FONT, 12));
//注意以下代码
NumberAxis verticalAxis = (NumberAxis)plot.getRangeAxis();
verticalAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
// 输出文件到指定目录
String rfname = MathUtil.getRoundCode(22) + "b.jpeg";
String fileName = "d:/test/" + rfname;
try {
  ChartUtilities.saveChartAsJPEG(new File(fileName), 100, chart, 600, 600);
  // log.info("....Create image File:" + fileName);
} catch (IOException exz) {
  System.out.print("....Cant’t Create image File");
}

Answer 2

//我编了一个静态的，看看效果怎么样
//------------------------------------------------------------------------import java.awt.RenderingHints;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;import java.awt.geom.Arc2D;
import java.awt.geom.Ellipse2D;
import javax.swing.JFrame;
import javax.swing.JPanel;public class DrawEllipse
extends JFrame
{ public DrawEllipse()
{
setTitle("柱形椭圆");
setSize(200,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); DrawPanel panel=new DrawPanel(); Container contentPane=getContentPane();
contentPane.add(panel,BorderLayout.CENTER); } public static void main(String[] args) 
{
new DrawEllipse().show();
} class DrawPanel
extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2=(Graphics2D)g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON); Dimension szFrame=getSize(); Ellipse2D ellip=new Ellipse2D.Double(szFrame.getWidth()*0.05
,szFrame.getHeight()*0.05,szFrame.getWidth()*0.9,
szFrame.getHeight()*0.5); Arc2D arc=new Arc2D.Double(ellip.getBounds2D(),0,99,Arc2D.PIE);

g2.setColor(Color.red);
g2.fill(arc);
g2.setColor(Color.yellow);
g2.draw(arc); arc=new Arc2D.Double(ellip.getBounds2D(),99,141,Arc2D.PIE); g2.setColor(Color.blue);
g2.fill(arc);
g2.setColor(Color.yellow);
g2.draw(arc); arc=new Arc2D.Double(ellip.getBounds2D(),240,120,Arc2D.PIE); g2.setColor(Color.green);
g2.fill(arc);
g2.setColor(Color.yellow);
g2.draw(arc); for(int i=2;i<=10;i++)
{ Ellipse2D szPie=new Ellipse2D.Double();
szPie.setFrame(ellip.getX(),
ellip.getY()+i,ellip.getWidth(),ellip.getHeight()); g2.setColor(Color.blue);
arc=new Arc2D.Double(szPie.getBounds2D(),180,60,Arc2D.OPEN);
g2.draw(arc);
g2.setColor(Color.yellow);
g2.draw(arc);
g2.setColor(Color.green);
arc=new Arc2D.Double(szPie.getBounds2D(),240,120,Arc2D.OPEN);
g2.draw(arc);
g2.setColor(Color.yellow);
g2.draw(arc); } }
}
}

Answer 3

Jfreechart我不知道这个是否支持jdk1.1.6版本的？

Answer 4

to:yeahjava(梦魂) 
上面的代码是我写的，实现不了上面提到的要求。

Answer 5

因为我只能用再浏览器中，所以只能用jdk1.1.6的，
它没有这个类包，所以只能自己写类包，但没有算法！！！！

Answer 6

import java.awt.RenderingHints;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Color;import java.awt.geom.Arc2D;
import java.awt.geom.Ellipse2D;
import javax.swing.JFrame;
import javax.swing.JPanel;public class DrawEllipse
extends JFrame
{ public DrawEllipse()
{
setTitle("柱形椭圆");
setSize(400,550);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); DrawPanel panel=new DrawPanel(); Container contentPane=getContentPane();
contentPane.add(panel,BorderLayout.CENTER); } public static void main(String[] args) 
{
new DrawEllipse().show();
} class DrawPanel
extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2=(Graphics2D)g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON); Dimension szFrame=getSize(); Ellipse2D ellip=new Ellipse2D.Double(szFrame.getWidth()*0.05
,szFrame.getHeight()*0.05,szFrame.getWidth()*0.9,
szFrame.getWidth()*0.9*0.4); Arc2D arc=new Arc2D.Double(ellip.getBounds2D(),0,99,Arc2D.PIE);

g2.setColor(Color.red);
g2.fill(arc);
g2.setColor(Color.yellow);
g2.draw(arc); arc=new Arc2D.Double(ellip.getBounds2D(),99,141,Arc2D.PIE); g2.setColor(Color.blue);
g2.fill(arc);
g2.setColor(Color.yellow);
g2.draw(arc); arc=new Arc2D.Double(ellip.getBounds2D(),240,120,Arc2D.PIE); g2.setColor(Color.green);
g2.fill(arc);
g2.setColor(Color.yellow);
g2.draw(arc); for(int i=2;i<=szFrame.getHeight()*0.5;i++)
{ Ellipse2D szPie=new Ellipse2D.Double();
szPie.setFrame(ellip.getX(),
ellip.getY()+i,ellip.getWidth(),ellip.getHeight()); g2.setColor(Color.blue);
arc=new Arc2D.Double(szPie.getBounds2D(),180,60,Arc2D.OPEN);
g2.draw(arc);
g2.setColor(Color.yellow);
g2.draw(arc);
g2.setColor(Color.green);
arc=new Arc2D.Double(szPie.getBounds2D(),240,120,Arc2D.OPEN);
g2.draw(arc);
g2.setColor(Color.yellow);
g2.draw(arc); }
}
}
}