十进制与26进制转换（Java）

import java.util.Scanner;

public class Test {
	
	// 共享成员变量,矩阵
		public static int[][] arr = null;
		// 主函数
		public static void main(String[] args) {
			Scanner scanner = new Scanner(System.in);
			while (scanner.hasNext()) {
				String str1 = scanner.nextLine();
				String str2 = scanner.nextLine();
//				System.err.println(str1 + "     " + str2);
				int x = trans(str1) + trans(str2);
//				System.out.println(x);
				System.out.println(tranString(x));
			}
//			System.out.println(trans("b"));
		}
	 
		 public static int trans(String str) {
			int count = 0;
			for (int i = str.length() - 1, j = 1; i >= 0; i--, j *= 26){
		        char c = str.charAt(i);
		        if (c < 'a' || c > 'z') return 0;
		        count += ((int)c - 'a') * j;
		    }
			return count;
		}
		 
		public static String tranString(int n) {
			String s = "";
		    while (n > 0){
		        int m = n % 26;
		        s = (char)(m + 'a') + s;
		        n = (n - m) / 26;
		    }
		    return s;
		} 



}