roundgraph.java

JAVA学生考试成绩分析程序

/*
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 */

package studentscore;

import java.awt.*;
import javax.swing.*;

/**
 *
 * @author Conupe Fox
 */
public class RoundGraph extends JPanel{
    private Result rs;
    
    public RoundGraph(Result rs){
        this.rs = rs;
    }
    @Override
    protected void paintComponent(Graphics g){
        super.paintComponent(g);
        //标题
        g.setFont(new Font("黑体", 0, 18));
        g.drawString("分数段分析饼图", 170, 50);
        //画圆
        int startAngle = 0;
        int arcAngle = 0;
        int i = 0;
        String [] level = {"60以下" , "60-69" , "70-79" , "80-89" , "90以上"};
        for(ColorEnum c : ColorEnum.values()){
            startAngle += arcAngle;
            arcAngle = (int)(rs.getPercentage(i) * 360);
            g.setColor(c.getColor());
            g.fillArc(50, 100, 200, 200, startAngle, arcAngle);
            g.fillRect(300, 100 + i * 50 , 20, 20);
            g.drawString(level[i] + ": " + String.valueOf(rs.getPercentage(i) * 100) + "%", 330, 110 + i * 50);
            i++;
        }          
    }
    
    public static void main(String[] args){
        JFrame frame = new JFrame();
        frame.getContentPane().add(new RoundGraph(new Result()));
        frame.setVisible(true);
        frame.setSize(500, 400);
    }
}