.before()和.after()

Question

我一直在尝试编写一个程序，该程序必须查看csv文件中的某个时间是在某个值之后还是之前。但是，我得到以下错误：

javaFiles\testing.java:116: error: cannot find symbol
                                        boolean before = result.format(formatter).before(calc);
                                                                                 ^
  symbol:   method before(LocalTime)
  location: class String
javaFiles\testing.java:117: error: cannot find symbol
                                        boolean after = result.format(formatter).after(calc2);
                                                                                ^
  symbol:   method after(LocalTime)
  location: class String

这是给出问题的代码：

LocalTime calc = LocalTime.parse("06:00", formatter);
LocalTime calc2 = LocalTime.parse("17:30", formatter);

//before and after , if true its night
boolean before = result.format(formatter).before(calc);
boolean after = result.format(formatter).after(calc2);

有关完整代码，请参阅https://pastebin.com/5EGurJig，这样我就不必在这里发送垃圾邮件了。

Answer 1

我不知道变量result有哪个类，但是您正在字符串上调用before和after，因为format调用的结果是一个字符串。因此，如果result也是LocalDate，则只需使用：

boolean before = result.isBefore(calc);
boolean after = result.isAfter(calc2);