[java]출생년도, 12간지 , 날짜 출력하기,DateTimeFormater

		System.out.println("태어난 연도를 입력하세요");
		Scanner in=new Scanner(System.in);
		int birthyear =in.nextInt();
		String ddi="";
		switch(birthyear%12) {
		case 0 :ddi="원숭이"; break;
		case 1 :ddi="닭"; break;
		case 2 :ddi="개"; break;
		case 3 :ddi="돼지"; break;
		case 4 :ddi="쥐"; break;
		case 5 :ddi="소"; break;
		case 6 :ddi="호랑이"; break;
		case 7 :ddi="토끼"; break;
		case 8 :ddi="용"; break;
		case 9 :ddi="뱀"; break;
		case 10 :ddi="말"; break;
		case 11:ddi="양"; break;

 

case가 참일때 스위치문을 끝내고 밑의 문장을 실행하지 않음

LocalDateTime today=LocalDateTime.now();

1.Date
   Date today = new Date();
   today.getFullTear(); -deplecate
   today.getMonths(); 
   today.getDate();
 2.java 1.6 Calendar
   Calendar.getInstance()
 3.java 1.7 SimpleDateFormat
 4.java 1.8 JoDaTime
 5.java 1.11 LocalDateTime

import java.time.DayOfWeek;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

 

LocalDateTime today=LocalDateTime.now();
		
		String toDayStr = today.format(
				DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss:SSS"));
                //2024-08-09 14:05:56:375(나노 세컨드)
		System.out.println(toDayStr);
		
		int year=today.getYear();
		System.out.println(year+"년");//2024
		
		int monval=today.getMonthValue();
		System.out.println(monval+"달");//8월
		
		int daymonths=today.getDayOfMonth();
		System.out.println(daymonths +"일");//9일
		
		int date=today.getDayOfYear();
		System.out.println(date+"일");//222
		
		DayOfWeek week=today.getDayOfWeek();
		System.out.println(week+"요일");//FRIDAY
				
		Month months=today.getMonth();
		System.out.println("Months:"+months);//AUGUST*/
		
		//올해 크리스마스 2000-12-25
		LocalDateTime xmas=LocalDateTime.of(
				2024,12,25,0,0,0);
		String xmasStr=xmas.format(DateTimeFormatter.ofPattern(
				"yyyy년 MM월 dd일 HH시 mm분 E요일"));
		System.out.println(xmasStr);

Class DateTimeFormatter

결과

참조:https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html

DateTimeFormatter (Java Platform SE 8 )