java - Merge arrylists and save as arraylist with in arraylist -

i have 3 array list , want merge array list 1 arraylist like, merge first object of arraylist 1 arraylist , put arraylist first object of new arraylist merge second object of arraylist 1 arraylist , put arraylist second object of new arraylist need output there possibility this

what asking transpose function.

here example using iterator, can handle number of lists, , each list can different size.

list<list<integer>> input = arrays.aslist(arrays.aslist(1,2,3,4),                                           arrays.aslist(5,6,7),                                           arrays.aslist(8,9,10,11,12));  iterator<integer>[] iters = new iterator[input.size()]; int = 0; (list<integer> list : input)     iters[i++] = list.iterator();  list<list<integer>> output = new arraylist<>(); while (true) {     list<integer> sublist = new arraylist<>(iters.length);     (iterator<integer> iter : iters)         if (iter.hasnext())             sublist.add(iter.next());     if (sublist.isempty())         break;     output.add(sublist); }  system.out.println("input:  " + input); system.out.println("output: " + output); 

output

input:  [[1, 2, 3, 4], [5, 6, 7], [8, 9, 10, 11, 12]] output: [[1, 5, 8], [2, 6, 9], [3, 7, 10], [4, 11], [12]]