[JAVA] 문자 비교(contains, indexOf, equals, matches)

JAVA에서 문자를 비교하는 방법은 여러가지가 있지만 대표적으로 비교하는

함수들(contains, indexOf, equals, matches)을 가지고 예제를 만들어 봤습니다.

 

public class study4 {
	public static void main (String[] args) {
		
		String comment = "Try not to become a man of success but rather try to become a man of value.";
		//contains, indexOf, equals, matches
		
		
		//contains 일치하면 true 반환
		System.out.println("contains return1: " + comment.contains("success but"));
		//contains 불일치하면 false 반환
		System.out.println("contains return2: " + comment.contains("fail but"));
		
		//indexOf 일치하면 true 반환
		System.out.println("indexOf return1: " + (comment.indexOf("man of") > -1));	
		//indexOf 불일치하면 false 반환
		System.out.println("indexOf return2: " + (comment.indexOf("woman of") > -1));
		
		//equals 일치하면 true 반환
		System.out.println("equals return1: " + comment.equals("Try not to become a man of success but rather try to become a man of value."));	
		//equals 불일치하면 false 반환
		System.out.println("equals return2: " + comment.equals("Try not to"));
				
		//matches 일치하면 true 반환
		System.out.println("matches return1: " + comment.matches(".*Try not to.*"));	
		//matches 불일치하면 false 반환
		System.out.println("matches return2: " + comment.matches("Try not to"));
				
	}
}

결과

contains return1: true
contains return2: false
indexOf return1: true
indexOf return2: false
equals return1: true
equals return2: false
matches return1: true
matches return2: false