大神们帮帮忙写写程序喽

package com.huawei.day25;

import java.util.HashMap;
import java.util.Map;

public class Test {
    private static final String ITEM_A = "item-a";
    private static final String ITEM_B = "item-b";
    private static final String ITEM_C = "item-c";
    private static final String ITEM_D = "item-d";
    //
    private static final String CLASS_KEY = "className";
    private static final String CLASS_A = "class-a";
    private static final String CLASS_B = "class-b";
    private static final String CLASS_C = "class-c";
    //
    private static final String GENDER_KEY = "gender";
    private static final String FEMALE = "female";
    private static final String MALE = "male";
    public static void main(String[] args) {
        // stuId,items
        Map<Integer, Map<String, Integer>> scoreMap = new HashMap<>();
        // stuId,info
        Map<Integer, Map<String, String>> infoMap = new HashMap<>();
        //
        Map<String, Integer> score = new HashMap<>();
        score.put(ITEM_A, 1);
        score.put(ITEM_B, 2);
        score.put(ITEM_C, 3);
        score.put(ITEM_D, 4);
        scoreMap.put(1, score);
        scoreMap.put(2, score);
        scoreMap.put(3, score);
        //
        Map<String, String> info = new HashMap<>();
        info.put(CLASS_KEY, CLASS_A);
        info.put(GENDER_KEY, FEMALE);
        infoMap.put(1, info);
        info = new HashMap<>();
        info.put(CLASS_KEY, CLASS_B);
        info.put(GENDER_KEY, MALE);
        infoMap.put(2, info);
        info = new HashMap<>();
        info.put(CLASS_KEY, CLASS_C);
        info.put(GENDER_KEY, FEMALE);
        infoMap.put(3, info);
        System.out.println(scoreMap);
        System.out.println(infoMap);
        // analysis result
        // class,score
        Map<String, Integer> classMap = new HashMap<>();
        // class,gender,score
        Map<String, Map<String,Integer>> stuMap = new HashMap<>();
        for(int stuId : scoreMap.keySet()) {
            Map<String, Integer> entry = scoreMap.get(stuId);
            String className = infoMap.get(stuId).get(CLASS_KEY);
            String gender = infoMap.get(stuId).get(GENDER_KEY);
            for(String itemName : entry.keySet()) {
                if(stuMap.get(className) == null) {
                    stuMap.put(className, new HashMap<>());
                }
                if(classMap.get(className) == null) {
                    classMap.put(className, 0);
                }
                if(stuMap.get(className).get(gender)==null) {
                    stuMap.get(className).put(gender, 0);
                }
                int tmpScore = stuMap.get(className).get(gender);
                stuMap.get(className).put(gender, tmpScore + entry.get(itemName));
                classMap.put(className, tmpScore + entry.get(itemName));
            }
        }
        System.out.println(classMap);
        System.out.println(stuMap);
    }
}