java - 如何简化将几个 boolean 对象表示为位序列？

Question

考虑选择一周中的几天，我们可以选择一天、几天或什么都不选。
我正在尝试按如下方式存储该数据:

public static final int NONE = 0b0000000;
public static final int MONDAY = 0b0000001;
public static final int TUESDAY = 0b0000010;
public static final int WEDNESDAY = 0b0000100;
public static final int THURSDAY = 0b0001000;
public static final int FRIDAY = 0b0010000;
public static final int SATURDAY = 0b0100000;
public static final int SUNDAY = 0b1000000;

其中0是NONE，11是MONDAY和TUESDAY，1000011是MONDAY，TUESDAY和SUNDAY；
有没有办法，我可以以更具可读性的方式编写相同的内容？

编辑:enums 的使用在 dalvik(android jvm)中有不错的性能惩罚，请不要建议它们。

Answer 1

我认为这与您正在尝试做的类似。

    public static final int NONE = 0;
    public static final int MONDAY = 1;
    public static final int TUESDAY = 2;
    public static final int WEDNESDAY = 4;
    public static final int THURSDAY = 8;
    public static final int FRIDAY = 16;
    public static final int SATURDAY = 32;
    public static final int SUNDAY = 64;

public static void main(String[] args) {

    int z = Integer.MAX_VALUE ^ SUNDAY ^ MONDAY;
    for (int x = 1; x <= 64; x = x * 2) {
        System.out.println(z & x);
    }
}

输出

0
2
4
8
16
32
0