개발 다이어리

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.function.BiFunction;

public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
	
		int value1 = scanner.nextInt();
		int value2 = scanner.nextInt();
		
		BiFunction<Integer, Integer, List<Integer>>  biFunc = 
				(val1,val2)->{
					List<Integer> list = new ArrayList<Integer>();
					int val001 = val2%10;
					int val010 = val2/10%10;
					int val100 = val2/100;
					
					list.add( val1*val001);
					list.add( val1*val010);
					list.add( val1*val100);
					list.add( val1*val2);
					
					return list;
				};
		List<Integer> resultList = calc(value1, value2, biFunc);

		for(Integer val : resultList) {
			System.out.println(val);
		}
		

	}

	public static List<Integer> calc(int a, int b, BiFunction<Integer, Integer, List<Integer>> biFunc){
		return biFunc.apply(a, b);
	}
}

핵심

자바의 정수형 연산 시 소수점 버림 활용 법