1. 숫자를 거꾸로 출력하기 package src; public class Practice1 { public static void solution(int num) { int answer = 0; if(0 == num) { System.out.println(answer); return; } String str = ""; if(num < 0) { num *= -1; while (0 != num) { str += num % 10; num /= 10; } answer = Integer.parseInt(str); System.out.println(-1 * answer); return; } while(0 != num){ str += num % 10; num /= 10; } answer = Integer.parseI..