为什么全局常量EMPLOYEE，可以直接写在switch-case的case结构中

Question

    public static final int EMPLOYEE = 10;
    public static final int PROGRAMMER = 11;
    public static final int DESIGNER = 12;
    public static final int ARCHITECT = 13;

    public static final int PC = 21;
    public static final int NOTEBOOK = 22;
    public static final int PRINTER = 23;

    //Employee  :  10, id, name, age, salary
    //Programmer:  11, id, name, age, salary
    //Designer  :  12, id, name, age, salary, bonus
    //Architect :  13, id, name, age, salary, bonus, stock
    public static final String[][] EMPLOYEES = {
        {"10", "1", "马云", "22", "3000"},
        {"13", "2", "马化腾", "32", "18000", "15000", "2000"},
        {"11", "3", "李彦宏", "23", "7000"},
        {"11", "4", "刘强东", "24", "7300"},
        {"12", "5", "雷军", "28", "10000", "5000"},
        {"11", "6", "任志强", "22", "6800"},
        {"12", "7", "柳传志", "29", "10800","5200"},
        {"13", "8", "杨元庆", "30", "19800", "15000", "2500"},
        {"12", "9", "史玉柱", "26", "9800", "5500"},
        {"11", "10", "丁磊", "21", "6600"},
        {"11", "11", "张朝阳", "25", "7100"},
        {"12", "12", "杨致远", "27", "9600", "4800"}
    };

---------------------------------------------------------------

int type = Integer.parseInt(EMPLOYEES[i][0]);
            switch (type){
                case EMPLOYEE:
                    break;
                case PROGRAMMER:
                    break;
                case DESIGNER:
                    break;
                case ARCHITECT:
                    break;
                }

type的值是10，应该是case 10:,为什么可以是case EMPLOYEE?

Answer 1

该回答引用GPTᴼᴾᴱᴺᴬᴵ
在这个代码片段中，常量 EMPLOYEE 的值是 10，因此 case EMPLOYEE 和 case 10 在语义上是等价的。在 Java 中，case 语句可以使用整数常量，枚举常量或 final 常量等，因此可以使用 EMPLOYEE 常量来代替数值常量 10。这种方式可以增加程序的可读性和可维护性。所以在 switch-case 结构中，可以直接使用常量 EMPLOYEE。