再议学生成绩统计

      建立一个高考分数（总分）统计系统，它能计算所有考生的平均分，总分，以及给出一个分数段，列出在这个区间类所有的考生人数和名单。

      这是由许多个同学，上一个是统计一个学生的系统。所以要建Student类。

    

   学生类：

package com.xzy;

public class Student {
	
	private String name;
    private int score;
    
    
    public Student(String name,int score){
    	this.name = name;
    	this.score = score;
    }
    public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getScore() {
		return score;
	}

	public void setScore(int score) {
		this.score = score;
	}

	public String toString(){
		return "姓名"+name +"分数"+score;
	}

}

 

统计类：

package com.xzy;

import java.util.ArrayList;
import java.util.List;

public class Caculator {
     private List<Student> students;
     
     public Caculator(){
    	 students = new ArrayList<Student>();
     }
     
     // 加入学生
     public void addStudent(Student student){
    	 students.add(student);
     }
     //求总分
     public int getSumScore(){
    	 int sum = 0;
    	 for(Student s:students){
    		 sum = sum + s.getScore();
    	 }
    	 return sum;
     }
     //平均分
     public int getAverageScore(){
    	 int sum = 0;
    	 for(Student s:students){
    		 sum = sum + s.getScore();
    	 }
    	 return sum/students.size();
     }
     //统计区间学生信息
     public int betweenScore(int min,int max){
    	 System.out.println("分数在"+min+" 和"+max+"之间");
    	 int count = 0;
    	 for(Student s:students){
    		 if(s.getScore()>min&&s.getScore()<max){
    			 System.out.println(s);
    			 count++;
    		 }
    		
    	 }
    	 return count;
     }
}

 

Main  输入学生信息

 

package com.xzy;

public class StudentInfo {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
       Caculator caculator = new Caculator();
       caculator.addStudent(new Student("Andy",450));
       caculator.addStudent(new Student("Babi",467));
       caculator.addStudent(new Student("Cidy",502));
       caculator.addStudent(new Student("Duck",425));
       caculator.addStudent(new Student("Girl",530));
       caculator.addStudent(new Student("Hill",401));
       caculator.addStudent(new Student("Milu",433));
       
      System.out.println("平均分数是"+caculator.getAverageScore());
      System.out.println("总分是"+caculator.getSumScore());
      System.out.println("共"+caculator.betweenScore(450, 550)+"人");
	}

}

 

 

 

结果：

平均分数是458
总分是3208
分数在450 和550之间
姓名Babi分数467
姓名Cidy分数502
姓名Girl分数530
共3人