小编青松周*_*青松周的帖子

我有一个关于@SneakyThrows的问题可以用来偷偷抛出已检查的异常而不在你的方法的throws子句中实际声明这一点.

public class Demo {

    public static void main(String[] args) {

    }

    private void throwE() throws ClassNotFoundException {

    }

    @SneakyThrows
    private void t() {
        throwE();
    }
}

这是由lombok生成的.

public class Demo {
    public Demo() {
    }

    public static void main(String[] args) throws IOException {
    }

    private void throwE() throws ClassNotFoundException {
    }

    private void t() {
        try {
            this.throwE();
        } catch (Throwable var2) {
            throw var2;
        }
    }
}

为什么lombok生成的代码可以在不声明throws子句的情况下伪造编译器.

    public static void main(String[] args) throws ParseException {
        long DAY = 1000 * 60 * 60 * 24;

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date yDate = simpleDateFormat.parse("2020-06-12 23:58:33");
        System.out.println(yDate.getTime() - (yDate.getTime() % DAY));

        Date date = simpleDateFormat.parse("2020-06-13 00:29:38");
        System.out.println(date.getTime() - date.getTime() % DAY);
    }

控制台打印：1591920000000 1591920000000