LintCode-Compare Strings

Compare two strings A and B, determine whether A contains all of the characters in B.

The characters in string A and B are all Upper Case letters.

Example

For A = "ABCD", B = "ABC", return true.

For A = "ABCD" B = "AABC", return false.

Solution:

public class Solution {
    /**
     * @param A : A string includes Upper Case letters
     * @param B : A string includes Upper Case letter
     * @return :  if string A contains all of the characters in B return true else return false
     */
    public boolean compareStrings(String A, String B) {
        int[] record = new int[256];
        Arrays.fill(record,0);
        for (int i=0;i<A.length();i++){
            int ind = (int) A.charAt(i);
            record[ind]++;
        }

        for (int i=0;i<B.length();i++){
            int ind = (int) B.charAt(i);
            if (record[ind]==0) return false;
            else record[ind]--;
        }

        return true;
    }
}