如何正确设置 javafx datepicker 值？
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How to set javafx datepicker value correctly?
提问by Hussein Saied
I used this method to setting datepicker value but sometimes throw an exception:
我使用此方法设置 datepicker 值但有时会引发异常：
public static final LocalDate LOCAL_DATE (String dateString){
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy");
LocalDate localDate = LocalDate.parse(dateString, formatter);
return localDate;
}
try {
datePicker.setValue(LOCAL_DATE("2016-05-01");
} catch (NullPointerException e) {
}
//the exception:
java.time.format.DateTimeParseException: Text '' could not be parsed at index 0
So what's the wrong here?
那么这里有什么问题呢？
采纳答案by James_D
You specify a format for parsing the date of dd-MM-yyyy:
您指定解析日期的格式dd-MM-yyyy：
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy");
but then you provide the date in a format that doesn't match that:
但随后您以不匹配的格式提供日期：
datePicker.setValue(LOCAL_DATE("2016-05-01"));
Obviously, "2016-05-01"is not in the format "dd-MM-yyyy".
显然，"2016-05-01"不是格式"dd-MM-yyyy"。
Try
尝试
datePicker.setValue(LOCAL_DATE("01-05-2016"));
