scorecolumnanasysjframe.java

用Java做的一个学生考试分析程序

/*
 * ScoreAnasysOfColumnTypeJPanel.java
 *
 * Created on 2007年12月15日, 下午4:41
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package 考试成绩分析程序;
import javax.swing.*;
import java.awt.*;
import java.util.*;
/**
 *
 * @author drawen
 */
public class ScoreColumnAnasysJFrame extends JFrame{
    private ScoreMenu scoreMenu;
    /** Creates a new instance of ScoreAnasysOfColumnTypeJPanel */
    public ScoreColumnAnasysJFrame(ScoreMenu scoreMenu) {
        this.scoreMenu=scoreMenu;
        this.setTitle("成绩单柱状图");
        JPanel left=new JPanel(new GridLayout(5,1));
        int number=scoreMenu.getNumberOfAttendTestStudent();
        int i;
        for(i=0;i<5;i++){
            left.add(new AsistantPanel((int)Math.round(number*(1-i/5.0)),true));
        }
        this.add(left,BorderLayout.WEST);
        JPanel down=new JPanel(new GridLayout(1,11));
        String []score={"<60分","60-69分","70-79分","80-89分",">=90分"};
        int j=0;
        down.add(new JLabel(" 0"));
        for(i=0;i<10;i++){
            if(i%2==0)
                down.add(new JLabel(score[j++]));
            else
                down.add(new JLabel(""));
        }
        this.add(down,BorderLayout.SOUTH);
        this.add(new ColumnTypeJPanel());
    }

    class ColumnTypeJPanel extends JPanel{
        /** Creates a new instance of ScoreAnasysOfColumnTypeJPanel */
        public ColumnTypeJPanel() {
            setBackground(Color.LIGHT_GRAY);
            repaint();
        }
        protected void paintComponent(Graphics g){
            super.paintComponent(g);
            int height=this.getHeight();
            int width=this.getWidth();
            int number=scoreMenu.getNumberOfAttendTestStudent();
            int[] score=scoreMenu.getAnasisOfScore();
            int interval=width/10,x,y,i;
            g.setColor(Color.BLACK);
            for(i=1;i<5;i++){
                y=i*height/5;
                g.drawLine(0,y,width,y);
            }
            g.setColor(Color.BLUE);
            for(i=0;i<5;i++){
                y=(int)(height*score[i]/(number*1.0));
                g.fillRect((int)(interval*(0.5+2*i)),height-y,interval,y);
            }
        }
    }
    class AsistantPanel extends JPanel{
        AsistantPanel(int num,boolean upper){
            setLayout(new GridLayout(4,1));
            if(upper){
                add(new JLabel(" "+String.valueOf(num)));
                for(int i=0;i<3;i++)
                    add(new JLabel(""));
            }
            else{                
                for(int i=0;i<3;i++)
                    add(new JLabel(""));
                add(new JLabel(" "+String.valueOf(num)));
            }
        }
    }
}