10. 루프(반복문)을 빠져 나오는 방법!

while문을 빠져 나오는 방법

 return; <-- 메소드 종료
 break; <-- switch와 반복문 종료
 continue;  <-- 반복문을 계속 진행한다.
 for문(증감자를 거친 조건문), while(조건식으로), do~while(조건식으로)

 

valid Check: 유효성 검사라고 한다.

validate

 

api문서에서 Deprecated가 있는것은 권장하지 않는다.라는 뜻이다.

api문서 참고 ~! 

x	The character x
\\	The backslash character
\0n	The character with octal value 0n (0 <= n <= 7)
\0nn	The character with octal value 0nn (0 <= n <= 7)
\0mnn	The character with octal value 0mnn (0 <= m <= 3, 0 <= n <= 7)
\xhh	The character with hexadecimal value 0xhh
\uhhhh	The character with hexadecimal value 0xhhhh
\x{h...h}	The character with hexadecimal value 0xh...h (Character.MIN_CODE_POINT  <= 0xh...h <=  Character.MAX_CODE_POINT)
\t	The tab character ('\u0009')
\n	The newline (line feed) character ('\u000A')
\r	The carriage-return character ('\u000D')
\f	The form-feed character ('\u000C')
\a	The alert (bell) character ('\u0007')
\e	The escape character ('\u001B')
\cx	The control character corresponding to x
[abc]	a, b, or c (simple class)
[^abc]	Any character except a, b, or c (negation)
[a-zA-Z]	a through z or A through Z, inclusive (range)
[a-d[m-p]]	a through d, or m through p: [a-dm-p] (union)
[a-z&&[def]]	d, e, or f (intersection)
[a-z&&[^bc]]	a through z, except for b and c: [ad-z] (subtraction)
[a-z&&[^m-p]]	a through z, and not m through p: [a-lq-z](subtraction)
.	Any character (may or may not match line terminators)
\d	A digit: [0-9]
\D	A non-digit: [^0-9]
\s	A whitespace character: [ \t\n\x0B\f\r]
\S	A non-whitespace character: [^\s]
\w	A word character: [a-zA-Z_0-9]
\W	A non-word character: [^\w]
\p{Lower}	A lower-case alphabetic character: [a-z]
\p{Upper}	An upper-case alphabetic character:[A-Z]
\p{ASCII}	All ASCII:[\x00-\x7F]
\p{Alpha}	An alphabetic character:[\p{Lower}\p{Upper}]
\p{Digit}	A decimal digit: [0-9]
\p{Alnum}	An alphanumeric character:[\p{Alpha}\p{Digit}]
\p{Punct}	Punctuation: One of !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
\p{Graph}	A visible character: [\p{Alnum}\p{Punct}]
\p{Print}	A printable character: [\p{Graph}\x20]
\p{Blank}	A space or a tab: [ \t]
\p{Cntrl}	A control character: [\x00-\x1F\x7F]
\p{XDigit}	A hexadecimal digit: [0-9a-fA-F]
\p{Space}	A whitespace character: [ \t\n\x0B\f\r]

		String id = "jinsil1106";
		// 아이디는 8~12자리 입니다. 영문자와 숫자 조합입니다.
		String idPattern = "[A-z0-9]{8,12}"; // 문자열 길이가 최소 8~12
		// {8,12} 8이상 12 이하{8, }: 최소 8이상 {8} : 8번
		System.out.println("아이디체크: " + id.matches(idPattern));

		String juminBunho = "960309-3012345";
		String juminPattern =  "[\\d]{6}-[\\d]{7}"; // <-- \사용시 \\를 써주면 역슬래시로 봐준다. 아니라면 문자열로 봄
		System.out.println("주민번호 체크: " + juminBunho.matches(juminPattern));