[자바/Java] Calendar클래스 활용 프로그램_주민등록번호

import java.util.Calendar;
import java.util.Scanner;

public class JuminEx {
	public static void main(String[] args) {
		String jumin = "", gender="", weather="";
		Calendar cal = Calendar.getInstance();
		
		Scanner scan = new Scanner(System.in);
		System.out.println("주민등록번호를 입력하세요 ((-)를 포함해서 입력) > ");
		jumin = scan.next();
		scan.close();
		int age = Integer.parseInt(jumin.substring(0,2)); //index 0,1
		char s = jumin.charAt(7);
		//남:1,3 여:2,4
		if(s=='1'||s=='3') {
			gender = "남";
		}else if(s=='2'||s=='4') {
			gender = "여";
		}else {
			gender = "외국인";
		}
		
		//나이구하기
		if(s=='1'||s=='2') { //1900년대 남,여
			age = (cal.get(Calendar.YEAR)-(1900+age)+1);
		}else if(s=='3'||s=='4') {
			age = (cal.get(Calendar.YEAR)-(2000+age)+1);
		}
		
		//계절구하기
		String w = jumin.substring(2,4); //index2,3
		switch (w) {
		case "12":
		case "01":
		case "02":
			weather = "겨울";
			break;
		case "03":
		case "04":
		case "05":
			weather = "봄";
			break;	
		case "06":
		case "07":
		case "08":
			weather = "여름";
			break;	
		case "09":
		case "10":
		case "11":
			weather = "가을";
			break;	
		}//end switch
		
		System.out.println("주민등록번호 : "+jumin);
		System.out.println("성별 : "+gender);
		System.out.println("나이 : "+age);
		System.out.println("태어난 계절 : "+weather);
		
		
	}

}

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