Java Data Type - 如何创建自定义日期时间格式化程序

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.temporal.ChronoField;

public class Main {

  public static void main(String[] args) {
    DateTimeFormatter formatter =  new DateTimeFormatterBuilder()
      .appendValue(ChronoField.HOUR_OF_DAY)
      .appendLiteral(":")
      .appendValue(ChronoField.MINUTE_OF_HOUR)
      .toFormatter();

    
    System.out.println(formatter.format(LocalDateTime.now()));
  }
}