Zerobase-miniproject

miniProject8.java

import java.util.Scanner;

public class Miniproject8 {

  // Enum으로 상수 정의
  public enum IncomeLevel {
    LEVEL_1(0, 12000000, 6, 0),
    LEVEL_2(12000000, 46000000, 15, 1080000),
    LEVEL_3(46000000, 88000000, 24, 5220000),
    LEVEL_4(88000000, 150000000, 35, 14900000),
    LEVEL_5(150000000, 300000000, 38, 19400000),
    LEVEL_6(300000000, 500000000, 40, 25400000),
    LEVEL_7(500000000, 1000000000, 42, 35400000),
    LEVEL_8(1000000000, Long.MAX_VALUE, 45, 65400000);

    private final long minIncome;
    private final long maxIncome;
    private final long taxRate;
    private final long deduction;

    IncomeLevel(long minIncome, long maxIncome, long taxRate, long deduction) {
      this.minIncome = minIncome;
      this.maxIncome = maxIncome;
      this.taxRate = taxRate;
      this.deduction = deduction;
    }

    public long getMinIncome() {
      return minIncome;
    }

    public long getMaxIncome() {
      return maxIncome;
    }

    public long getTaxRate() {
      return taxRate;
    }

    public long getDeduction() {
      return deduction;
    }
  }

  // 입력부분(연소득 받아오기)
  public static long input() {
    long annual_income;
    try(Scanner sc = new Scanner(System.in)) {
      System.out.println("[과세금액 계산 프로그램]");
      while (true) {
        System.out.print("연소득을 입력해 주세요.:");
        annual_income = sc.nextLong();

        // 예외부분처리
        if (annual_income < 0) {
          System.out.print("다시 입력해주세요.");
          continue;
        }
        break;
      }
      return annual_income;
    }
  }

  // 누진공제 계산
  public static long Deduction(long annual_income,int idx){
    return (annual_income * IncomeLevel.values()[idx].getTaxRate() / 100) - IncomeLevel.values()[idx].getDeduction();
  }


  public static void main(String[] args) {

    long annual_income = input();

    int idx = -1; // 인덱스설정
    long totaltax = 0;

    //세금계산
    for (IncomeLevel level : IncomeLevel.values()) {
      idx++;
      if (annual_income > level.getMaxIncome()) { // Enum 값 사용
        long tax = (level.getMaxIncome() - level.getMinIncome()) * level.getTaxRate() / 100;
        System.out.printf("%,15d * %2d%% = %,12d \n", (level.getMaxIncome() - level.getMinIncome()), level.getTaxRate(), tax);
        totaltax += tax;
      } else {
        long tax = (annual_income - level.getMinIncome()) * level.getTaxRate() / 100;
        System.out.printf("%,15d * %2d%% = %,12d \n", (annual_income - level.getMinIncome()), level.getTaxRate(), tax);
        totaltax += tax;
        break;
      }
    }
    System.out.println();
    System.out.printf("[세율에 의한 세금]: \t\t\t\t\t %,12d\n",totaltax);
    System.out.printf("[누진공제 계산에 의한 세금]: \t %,12d",Deduction(annual_income,idx));
  }
}