java课堂作业（十一）

/*

某中学有若干学生(学生对象放在一个List中)，每个学生都有一个姓名属性、班级名称属性(String)和考试成绩属性(int)，某次考试结束后，每个学生都获得了一个考试成绩。请打印出每个班级的总分和平均分。

*/

转自：http://www.cnblogs.com/zebbin/archive/2013/01/22/2872025.html

package com.study.java11;

//Student类
public class Student
{
    private String name; //学生姓名
    private Team team;    //学生所在班级
    private int score;    //学生成绩
    public Student(String name,int score)
    {
        this.setName(name);
        this.setScore(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 Team getTeam()
    {
        return team;
    }
    public void setTeam(Team team)
    {
        this.team = team;
    }
    
    public String toString() //覆写toString方法
    {
        return "	|-姓名:"+this.name +";成绩:"+this.score;
    }
}

package com.study.java11;

//Team类
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;


public class Team
{
    private String name; //班级名称
    private List<Student> list; //学生list(一个班级里有很多学生)
    
    public Team()
    {
        this.list = new ArrayList<Student>();
    }
    
    public Team(String name)
    {
        this();
        this.setName(name);
    }

    public String getName()
    {
        return name;
    }

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

    public List<Student> getList()
    {
        return list;
    }

    public void setList(List<Student> list)
    {
        this.list = list;
    }
    public String toString()
    {
        return "班级名称"+this.name;
    }
    
    public double sum()
    {
        Iterator<Student> iter =list.iterator(); 
        double sum = 0;
        while(iter.hasNext())
        {
            Student s = iter.next();
            sum += s.getScore();
        }
        
        return sum;
    }
    
    public double average()
    {
        return this.sum()/list.size();
    }
}

package com.study.java11;

import java.util.Iterator;


public class TestList
{
    public static void main(String[] args)
    {
        Student s1 = new Student("张三",46);
        Student s2 = new Student("李四",98);
        Student s3 = new Student("王五",47);
        Student s4 = new Student("任六",87);
        Student s5 = new Student("黑七",45);
        Student s6 = new Student("赵四",87);
        Student s7 = new Student("孙九",95);
        Student s8 = new Student("钱七",76);
        
        Team t1 = new Team("一班");
        Team t2 = new Team("二班");
        
        t1.getList().add(s1);
        t1.getList().add(s2);
        t1.getList().add(s6);
        t1.getList().add(s8);
        
        t2.getList().add(s3);
        t2.getList().add(s4);
        t2.getList().add(s5);
        t2.getList().add(s7);
        
        s1.setTeam(t1);
        s2.setTeam(t1);
        s6.setTeam(t1);
        s8.setTeam(t1);
        
        s3.setTeam(t2);
        s4.setTeam(t2);
        s5.setTeam(t2);
        s7.setTeam(t2);
        
        System.out.println(t1);
        Iterator<Student> iter1 = t1.getList().iterator();
        while(iter1.hasNext())
        {
            Student s = iter1.next();
            System.out.println(s);
        }
        
        System.out.println("总成绩为:"+t1.sum()+",平均成绩为:"+t1.average());
        System.out.println("--------------------------------");
        
        System.out.println(t2);
        Iterator<Student> iter2 = t2.getList().iterator();
        while(iter2.hasNext())
        {
            Student s = iter2.next();
            System.out.println(s);
        }
        
        System.out.println("总成绩为:"+t2.sum()+",平均成绩为:"+t2.average());
        System.out.println("--------------------------------");
    
    }
}