©TCP-tryJAVA

import java.util.function.*;

public class prog {
	public static void main(String[] args){
		DoubleUnaryOperator oper;
		
		oper = (n) -> Math.abs(n);	// 람다 표현식
		System.out.println(oper.applyAsDouble(-5));
		
		oper = Math::abs;			// 메소드 참조
		System.out.println(oper.applyAsDouble(-5));
	}
}