static String remDupsSorted(String str)
{
    int p = 1, q = 1;
    char a[] = str.toCharArray();
    while (q != a.length)
    {
        if(a[q] != a[q-1])
        {
            a[p] = a[q];
            p++;
        }
        q++;  
    }
    str = new String(a);
    return str.substring(0,p);
}
static String remDup(String str)
{    
   char temp[] = str.toCharArray();
   Arrays.sort(temp);
   str = new String(temp);
   return remDupsSorted(str);
}

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