JAVA 금액 한글로 변환

public String convertMoneyToHangul(String money) {
	String[] han1 = {"","일","이","삼","사","오","육","칠","팔","구"};
	String[] han2 = {"","십","백","천"};
	String[] han3 = {"","만","억","조","경"};
	
	StringBuffer result = new StringBuffer();
	int len = money.length();
	int nowInt = 0;


	for(int i=len ; i > 0; i--){

		nowInt = Integer.parseInt(String.valueOf(money.charAt(len - i)));

		if(nowInt > 0){
			result.append(han1[nowInt]);// 숫자
			result.append(han2[i % 4]); // 십,백,천
	 	}

	 	// 만,억,조,경(4단위)
	 	if(i % 4 == 0){
	  		result.append(han3[i / 4]); // 천단위
			result.append(" ");
	 	}
	}
	return result.toString();
 }


 System.out.println(convertMoneyToHangul("12345678912"));