circlegraph.java

实现了一个小型的成绩管理系统。希望能帮助大家。

package Course;

import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.Color;
import java.math.*;
/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class CircleGraph extends JPanel{
    double[] Score={1,61,70,80,90};
    public CircleGraph() {
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    public CircleGraph(double[] Score) {
        this.Score=Score;
    }
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        int[] a={0,0,0,0,0};

        for(int i=0;i<Score.length;i++)
        {
            if(Score[i]<60)a[0]++;
            else if((Score[i]>=60)&&(Score[i]<70))a[1]++;
            else if((Score[i]>=70)&&(Score[i]<80))a[2]++;
            else if((Score[i]>=80)&&(Score[i]<90))a[3]++;
            else a[4]++;
        }
        double[] k=new double[5];
        k[0]=(double)a[0]/(Score.length);
        k[1]=(double)a[1]/(Score.length);
        k[2]=(double)a[2]/(Score.length);
        k[3]=(double)a[3]/(Score.length);
        k[4]=(double)a[4]/(Score.length);
        g.setColor(Color.blue);
        g.fillArc(10,30,getHeight()*3/4,getHeight()*3/4,0,(int)(360*k[0]));
        g.fillRect(260,110,20,20);
        g.setColor(Color.pink);
        g.fillArc(10,30,getHeight()*3/4,getHeight()*3/4,(int)(360*k[0]),(int)(360*k[1]));
        g.fillRect(260,135,20,20);
        g.setColor(Color.gray);
        g.fillArc(10,30,getHeight()*3/4,getHeight()*3/4,(int)(360*k[0])+(int)(360*k[1]),(int)(360*k[2]));
        g.fillRect(260,160,20,20);
        g.setColor(Color.magenta);
        g.fillArc(10,30,getHeight()*3/4,getHeight()*3/4,(int)(360*k[0])+(int)(360*k[1])+(int)(360*k[2]),0+(int)(360*k[3]));
        g.fillRect(260,185,20,20);
        g.setColor(Color.DARK_GRAY);
        g.fillArc(10,30,getHeight()*3/4,getHeight()*3/4,(int)(360*k[0])+(int)(360*k[1])+(int)(360*k[2])+0+(int)(360*k[3]),0+(int)(360*k[4]));
        g.fillRect(260,210,20,20);

        g.setColor(Color.BLACK);
        g.drawRect(258,105,170,130);
        g.drawString(":x < 60",280,125);
        g.drawString(":60 >=x< 70",280,150);
        g.drawString(":70 >=x< 80",280,175);
        g.drawString(":80 >=x< 90",280,200);
        g.drawString(":90 >=x< 100",280,225);
        g.drawString(a[0]+"人 "+(double)((int)(k[0]*10000))/100+"%",360,125);
        g.drawString(a[1]+"人 "+(double)((int)(k[1]*10000))/100+"%",360,150);
        g.drawString(a[2]+"人 "+(double)((int)(k[2]*10000))/100+"%",360,175);
        g.drawString(a[3]+"人 "+(double)((int)(k[3]*10000))/100+"%",360,200);
        g.drawString(a[4]+"人 "+(double)((int)(k[4]*10000))/100+"%",360,225);

    }
    public Dimension getPreferredSize()
    {
        return new Dimension(400,400);
    }

    private void jbInit() throws Exception {
        this.setLayout(null);
    }

}