[JAVA] 화폐단위 숫자형을 문자형으로 변환

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

 

public class Test{

 

 public String rtn1(long d, int b) {
  String c = "##,####";
  if (b != 0) {
   c = c += ",";
  }
  
  for (int i = 0; i < b; i++) {
   c += "#";
  }
  
  DecimalFormat df = new DecimalFormat(c);
  String dfVal = df.format(d);
  
  return dfVal;
 }
 
 public void rtn2(String r) {
  String[] arr = r.split(",");
  StringBuilder sb = new StringBuilder();
  for (int i = 0; i < arr.length; i++) {
   sb.append(cal(arr[i]));
   if (arr.length - i == 4) {
    sb.append("조");
   } else if (arr.length - i == 3) {
    sb.append("억");
   } else if (arr.length - i == 2) {
    sb.append("만");
   } else if (arr.length - i == 1) {
    sb.append("원");
   }
  }
  System.out.println("자바 환산된 단위 :: "+sb.toString());
 }
 
 public String cal(String s) {
  char[] c = s.toCharArray();
  int l = c.length;
  String r = "";
  for (int i = 0; i < c.length; i++) {
   if (l - i == 4) {
    switch(c[i])
    {
     case '1' :
      r += "일천"; break;
     case '2' :
      r += "이천"; break;
     case '3' :
      r += "삼천"; break;
     case '4' :
      r += "사천"; break;
     case '5' :
      r += "오천"; break;
     case '6' :
      r += "육천"; break;
     case '7' :
      r += "칠천"; break;
     case '8' :
      r += "팔천"; break;
     case '9' :
      r += "구천"; break;
     case '0' :
      r += ""; break;
      
    }
   } else if (l - i == 3) {
    switch(c[i])
    {
    case '1' :
     r += "일백"; break;
    case '2' :
     r += "이백"; break;
    case '3' :
     r += "삼백"; break;
    case '4' :
     r += "사백"; break;
    case '5' :
     r += "오백"; break;
    case '6' :
     r += "육백"; break;
    case '7' :
     r += "칠백"; break;
    case '8' :
     r += "팔백"; break;
    case '9' :
     r += "구백"; break;
    case '0' :
     r += ""; break;
     
    }
   } else if (l - i == 2) {
    switch(c[i])
    {
    case '1' :
     r += "일십"; break;
    case '2' :
     r += "이십"; break;
    case '3' :
     r += "삼십"; break;
    case '4' :
     r += "사십"; break;
    case '5' :
     r += "오십"; break;
    case '6' :
     r += "육십"; break;
    case '7' :
     r += "칠십"; break;
    case '8' :
     r += "팔십"; break;
    case '9' :
     r += "구십"; break;
    case '0' :
     r += ""; break;
     
    }
   } else if (l - i == 1) {
    switch(c[i])
    {
    case '1' :
     r += "일"; break;
    case '2' :
     r += "이"; break;
    case '3' :
     r += "삼"; break;
    case '4' :
     r += "사"; break;
    case '5' :
     r += "오"; break;
    case '6' :
     r += "육"; break;
    case '7' :
     r += "칠"; break;
    case '8' :
     r += "팔"; break;
    case '9' :
     r += "구"; break;
    case '0' :
     r += ""; break;
     
    }
   }
  }
  return r;
 }
 
 public static void main(String[] args) throws Exception {
  Test t = new Test();
  long i = Long.parseLong("1034567890123456");
  String rtn1 = t.rtn1(i, 0);
  t.rtn2(rtn1);  
 }

}