result.java

JAVA学生考试成绩分析程序

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 */

package studentscore;

import java.util.Iterator;

/**
 *
 * Result.java
 * 结果类
 * @author Conupe Fox
 */
public class Result {

    private float highest;          //最高分
    private float lowest;           //最低分
    private float average;          //平均分
    private int [] scoreList;       //分数段人数
    private float [] precentage;    //分数段百分比
    
    /**构造方法*/
    public Result(){
        highest = -1;
        lowest = 101;
        average = 0;
        scoreList = new int[5];
        precentage = new float[5];
    }
    
    /** getter */
    public float getHighest(){
        return highest;
    }
    public float getLowest(){
        return lowest;
    }
    public float getAverage(){
        return average;
    }
    public int getScoreList(int i){
        return scoreList[i];
    }
    public float getPercentage(int i){
        return precentage[i];
    }
    public int getMaxScoreList(){
        int max = 1;
        for(int i = 0; i < 5; i++){
            max = Math.max(max, this.getScoreList(i));
        }
        return max;
    }
    
    /** setter */
    public void setHighest(float score){
        this.highest = score;
    }
    public void setLowest(float score){
        this.lowest = score;
    }
    public void setAverage(float score){
        this.average = score;
    }
    public void setPercentage(int i, float precentage){
        this.precentage[i] = precentage;
    }
    public void addScoreList(int i){
        scoreList[i]++;
    }
    
    public static Result scoreAnalyse(Classes c, Lesson l){
        Result rs = new Result();
        float sum = 0;
        Iterator itStu = c.getStudentList().iterator();
        while(itStu.hasNext()){
            Student stu = (Student)itStu.next();
            Lesson ls = Fuction.getLesson(stu, l);
            if(ls != null){
                float score =ls.getScore();
                if(score < rs.getLowest())
                    rs.setLowest(score);
                if(score > rs.getHighest())
                    rs.setHighest(score);
                sum += score;
                if(score >= 0 && score < 60)
                    rs.addScoreList(0);
                else if(score >= 60 && score < 70)
                    rs.addScoreList(1);
                else if(score >= 70 && score < 80)
                    rs.addScoreList(2);
                else if(score >= 80 && score < 90)
                    rs.addScoreList(3);
                else 
                    rs.addScoreList(4);
            }
        }
        rs.setAverage(sum / c.getStudentList().size());
        if(c.getStudentList().size() != 0){
            for(int i = 0; i < 5; i++){
                rs.setPercentage(i, (float)rs.getScoreList(i) / c.getStudentList().size());
            }
        }   
        return rs;
    }
}