©TCP-tryJAVA

import java.util.Optional;

public class prog {
	public static void main(String[] args){
		Optional<String> opt = Optional.empty();	// Optional를 null로 초기화함.
		
		System.out.println(opt.orElse("빈 Optional 객체"));
		System.out.println(opt.orElseGet(String::new));
	}
}