java - convert an int array to another fixed length array with lambda -

what equivalent of following function lambda?

private string convertweekdaytobitstring(int[] ia) {     int[] sa = {0, 0, 0, 0, 0, 0, 0};     (int : ia) {         if (i > 0 && < 8) {           sa[i-1] = 1;         }     }     return arrays.tostring(sa).replace("[", "").replace("]", "").trim(); } 

the purpose of function, mark "day of week" 1 according input array. example, if input array [5,6], output should 0,0,0,0,1,1,0

you stream 7 values using intstream, , each 1 check if it's in input array. if input array guaranteed sorted, use single statement this:

return intstream     .range(0, 7)     .maptoobj(x -> string.valueof(arrays.binarysearch(ia, x) >= 0 ? 1 : 0))     .collect(collectors.joining(", "));