A+B Coming

Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6819 Accepted Submission(s): 3122  Problem Description Many classmates said to me that A+B is must needs. If you can’t AC this problem, you would invite me for night meal. ^_^   Input Input may contain multiple test cases. Each case contains A and B in one line. A, B are hexadecimal number. Input terminates by EOF.   Output Output A+B in decimal number in one line.   Sample Input 1 9 A B a b   Sample Output 10 21 21

import java.util.*; class Main{     public static void main(String args[]){         Scanner reader=new Scanner(System.in);         while(reader.hasNextInt()){         int a=reader.nextInt();         int b=reader.nextInt();         int sum=a+b;         System.out.println(sum);}         while(reader.hasNext()){         String c=reader.next();         String d=reader.next();             int e = Integer.parseInt(c, 16);         int f = Integer.parseInt(d, 16);         int sum=e+f;         System.out.println(sum);         }}}    

真不知道哪里错了 心烦