学步园

本来想用FastScatterChart ，发现功能很单一，写了个简单的ScatterChart，加上了注释功能

package analysis;

import java.awt.BasicStroke;
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.annotations.XYTextAnnotation;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.xy.DefaultXYDataset;
import org.jfree.ui.RefineryUtilities;

public class ScatterPlot {
	 public static void data(String title,String[] a,String[] b)
	    {
	        DefaultXYDataset   xydataset = new DefaultXYDataset ();
	        
	        double[][] data=new double[2][a.length];
		    for(int i=0;i<a.length;i++)
		    {
		     data[0][i]=Double.parseDouble(a[i]);
		     data[1][i]=Double.parseDouble(b[i]);
		    }
	       xydataset.addSeries("牛的无线定位", data);
	       
	       XYTextAnnotation text1 = new XYTextAnnotation("1sss",2, 2); 
	        XYTextAnnotation text2 = new XYTextAnnotation("2aaa", 4, 4);  
	        XYTextAnnotation text3 = new XYTextAnnotation("3bbb", 7, 5);
	       
	       final JFreeChart chart =ChartFactory.createScatterPlot("","","",xydataset,PlotOrientation.VERTICAL,false,false,false);
	        
	       XYPlot xyplot = (XYPlot) chart.getPlot();
	       xyplot.addAnnotation(text1);
	       xyplot.addAnnotation(text2);
	       xyplot.addAnnotation(text3);
	       
	       ChartFrame frame = new ChartFrame(title,chart);
	        frame.pack();
	        RefineryUtilities.centerFrameOnScreen(frame);
	        frame.setVisible(true);
	    }
	 

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String[] a ={"7","2","4"};
		String[] b ={"5","2","4"};
		ScatterPlot.data("title", a, b);
	}

}