rectgraph.java

JAVA学生考试成绩分析程序

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package studentscore;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.*;
/**
 *
 * @author Conupe Fox
 */
public class RectGraph extends JPanel{
    private Result rs;
    
    public RectGraph(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("分数段分析柱状图", 170, 50);
        //y轴
        g.drawLine(50, 50, 50, 250);
        //y轴箭头
        g.drawLine(50, 50, 40, 60);
        g.drawLine(50, 50, 60, 60);
        //x轴
        g.drawLine(50, 250, 450, 250);
        //x轴箭头
        g.drawLine(450, 250, 440, 240);
        g.drawLine(450, 250, 440, 260);
        //横坐标
        g.drawString("60以下", 60, 280);
        g.drawString("60-69", 130, 280);
        g.drawString("70-79", 200, 280);
        g.drawString("80-89", 270, 280);
        g.drawString("90以上", 340, 280);
        //标签
        g.drawString("人数", 10, 80);
        g.drawString("分数段", 420, 280);
        //每人占的像素
        int px = 200 / (rs.getMaxScoreList() + 1);
        //画图形
        int i = 0;
        int x = 60;
        for(ColorEnum c : ColorEnum.values()){
            g.setColor(c.getColor());
            g.fillRect(x, 250 - px * rs.getScoreList(i), 40, px * rs.getScoreList(i));
            g.drawString(String.valueOf(rs.getScoreList(i)), x + 20, 250 - px * rs.getScoreList(i) - 20);
            i++;
            x += 70;
        }
    }
    
    public static void main(String[] args){
        JFrame frame = new JFrame();
        frame.getContentPane().add(new RectGraph(new Result()));
        frame.setVisible(true);
        frame.setSize(500, 400);
    }
}