我正在使用日期时间格式以特定模式打印日期时间,但我的编译器抛出错误。
import java.util.Date;
import java.time.*;
import java.text.SimpleDateFormat;
public class fewdays{
public static void main(String[] args){
LocalDate today = LocalDate.now() ;
LocalDate then = today.minusDays( 2 ) ;
LocalTime time_ago = LocalTime.now();
LocalDateTime dt = LocalDateTime.of(then, time_ago);
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
System.out.println(dtf.format(dt));
}
}
现在编译器显示此错误消息:
error: cannot find symbol
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
^
symbol: variable DateTimeFormatter
location: class fewdays
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