练习Map集合对象进行查找世界杯冠军年份、地点、夺冠国家

//作为对象传进Map里面
class Test13{
    private String yearPlay;
    private String location;
    public String getYearPlay() {
        return yearPlay;
    }
    public void setYearPlay(String yearPlay) {
        this.yearPlay = yearPlay;
    }

    public String getLocation() {
        return location;
    }

    public void setLocation(String location) {
        this.location = location;
    }

    public Test13(String yearPlay, String location) {
        this.yearPlay = yearPlay;
        this.location = location;
    }

    @Override
    public String toString() {
        return "举办年份：" + yearPlay +
                " 举办地点：" + location ;
    }
}

class Test14{
    public static void main(String[] args) {
        Map<Test13, String> map = new HashMap<>();
        map.put(new Test13("1930", "乌拉圭"), "乌拉圭");
        map.put(new Test13("1934", "意大利"), "意大利");
        map.put(new Test13("1938", "法国"), "意大利");
        map.put(new Test13("1950", "巴西"), "乌拉圭");
        map.put(new Test13("1954", "瑞士"), "西德");
        map.put(new Test13("1958", "瑞典"), "巴西");
        map.put(new Test13("1931", "乌拉圭"), "乌拉圭");
        boolean flag=true;
        while (true){
            System.out.println("*****************查找世界杯********************");
            System.out.println("1.输入年份查找"+"\n"+"2.输入举办国家查找"+"\n"+"3.输入当年夺冠国家查找");
            System.out.println("**********************************************");
            System.out.println("输入你的选择：");
            Scanner scanner=new Scanner(System.in);
            String choiceNum=scanner.nextLine();
            switch (choiceNum){
                case "1":
                    findYear(map);
                    break;
                case "2":
                    findCountry(map);
                    break;
                case "3":
                    findChampionCountry(map);
                    break;
                case "4":
                    System.exit(0);
            }
        }
    }
    public static void findYear(@NotNull Map<Test13,String> map){
        Set<Map.Entry<Test13, String>> entrySet = map.entrySet();
        System.out.println("输入年份：");
        Scanner scanner = new Scanner(System.in);
        String inputYear = scanner.nextLine();
        boolean flag = true;
        while (flag) {
            Iterator it = entrySet.iterator();
            while (it.hasNext()) {
                Map.Entry<Test13, String> entryYear = (Map.Entry<Test13, String>) it.next();
                if (entryYear.getKey().getYearPlay().equals(inputYear)) {
                    System.out.println(entryYear.getKey() + " 冠军是:" + entryYear.getValue());
                    flag=false;
                }
            }
            if (flag==true) {
                System.out.println("没有这个时间！");
                inputYear=scanner.nextLine();
            }
        }
    }
    public static void findCountry(@NotNull Map<Test13,String> map){
        Set<Map.Entry<Test13, String>> entrySet = map.entrySet();
        System.out.println("输入举办国家：");
        Scanner scanner = new Scanner(System.in);
        String inputCountry = scanner.nextLine();
        boolean flag = true;
        while (flag) {
            Iterator it = entrySet.iterator();
            while (it.hasNext()) {
                Map.Entry<Test13, String> entryYear = (Map.Entry<Test13, String>) it.next();
                if (entryYear.getKey().getLocation().equals(inputCountry)) {
                    System.out.println(entryYear.getKey() + " 冠军是:" + entryYear.getValue());
                    flag=false;
                }
            }
            if (flag==true) {
                System.out.println("没有这个国家！");
                inputCountry=scanner.next();
            }
        }
    }
    public static void findChampionCountry(@NotNull Map<Test13,String> map){
        Set<Map.Entry<Test13, String>> entrySet = map.entrySet();
        System.out.println("输入夺冠国家：");
        Scanner scanner = new Scanner(System.in);
        String inputCountry = scanner.nextLine();
        boolean flag = true;
        while (flag) {
            Iterator it = entrySet.iterator();
            while (it.hasNext()) {
                Map.Entry<Test13, String> entryYear = (Map.Entry<Test13, String>) it.next();
                if (entryYear.getValue().equals(inputCountry)) {
                    System.out.println(entryYear.getKey() + " 冠军是:" + entryYear.getValue());
                    flag=false;
                }
            }
            if (flag==true) {
                System.out.println("没有这个国家！");
                inputCountry=scanner.next();
            }
        }
    }
}