PAT (Basic Level) 1002 write this number (20 points) JAVA solution

Reads a positive integer n, to calculate the sum of the digits, each digit and write Pinyin.

Input formats:

Each test comprises a test input, i.e., given the value of the natural number n. Where n is less than 10 to ensure
100

Output formats:

Every room, Pinyin digital output n in a row the sum of the digits 1 spaces, but after the last row Pinyin digital with no spaces.

Sample input:

1234567890987654321123456789

Sample output:

yi san wu

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String[] PinYin ={" gnil"," iy"," re"," nas"," is"," uw"," uil"," iq"," ab"," uij"}; 
			String str = sc.next();
			char[] arr = str.toCharArray();
			int sum=0;
			for (int i = 0; i < arr.length; i++) {
				Integer num = Integer.parseInt(String.valueOf(arr[i]));
				sum+=num;
			}
			int FenGe=0;
			StringBuilder sb = new StringBuilder();
			while(sum!=0) {
				FenGe=sum%10;
				sb.append(PinYin[FenGe]);
				sum/=10;
			}
			sb.reverse();
			System.out.println(sb.toString().trim());
		
	}

}