定义可以在java中的switch语句中使用的#define之类的常量

public class SwitchExample {
    public static void main(String[] args) {
        final int ONE = 1;
        final int TWO = 2;
        final int THREE = 3;

        int value = 2;

        switch (value) {
            case ONE:
                System.out.println("Value is 1");
                break;
            case TWO:
                System.out.println("Value is 2");
                break;
            case THREE:
                System.out.println("Value is 3");
                break;
            default:
                System.out.println("Value is not 1, 2, or 3");
                break;
        }
    }
}