ClassScore类

package com.imooc.chapter14test;

public class ClassScore {
    private float chineseScore; //语文平均分
    private float mathScore; //数学平均分
    private float englishScore; //英语平均分

    //创建无参构造方法
    public ClassScore() {
    }
    //创建含参构造方法
    public ClassScore(float chineseScore, float mathScore, float englishScore) {
        this.chineseScore = chineseScore;
        this.mathScore = mathScore;
        this.englishScore = englishScore;
    }

    public float getChineseScore() {
        return chineseScore;
    }

    public void setChineseScore(float chineseScore) {
        this.chineseScore = chineseScore;
    }

    public float getMathScore() {
        return mathScore;
    }

    public void setMathScore(float mathScore) {
        this.mathScore = mathScore;
    }

    public float getEnglishScore() {
        return englishScore;
    }

    public void setEnglishScore(float englishScore) {
        this.englishScore = englishScore;
    }

    //重写toString方法
    @Override
    public String toString() {
        return "语文: " + chineseScore +
                ",数学: " + mathScore +
                ",英语: " + englishScore
                ;
    }
}

测试类

package com.imooc.chapter14test;

import java.util.*;

public class ClassScoreTest {
    public static void main(String[] args) {
        //初始化5个ClassScore对象
        ClassScore cs1 = new ClassScore(96.5f,98.8f,95.2f);
        ClassScore cs2 = new ClassScore(96.7f,97.5f,96.5f);
        ClassScore cs3 = new ClassScore(95.9f,98.2f,95.5f);
        ClassScore cs4 = new ClassScore(97.3f,97.9f,96.8f);
        ClassScore cs5 = new ClassScore(96.6f,98.5f,96.3f);
        //创建一年级hashMap集合
        Map<String, ClassScore> classMap = new HashMap<>();
        classMap.put("一年1班",cs1);
        classMap.put("一年2班",cs2);
        classMap.put("一年3班",cs3);
        classMap.put("一年4班",cs4);
        classMap.put("一年5班",cs5);
        //使用Entry对象遍历Map总的元素
        Set<Map.Entry<String, ClassScore>> entrySet = classMap.entrySet();
        for (Map.Entry<String, ClassScore> item:
             entrySet) {
            System.out.println(item.getKey() + "-> " + item.getValue());
        }
    }
}