Merging two arrayLists into a new arrayList, with no duplicates and in order, in Java

Question

I am trying to \"combine\" two arrayLists, producing a new arrayList that contains all the numbers in the two combined arrayLists, but without any duplicate elements and the

Answer 1

I got your point that you don't wanna use the built-in functions for merging or remove duplicates from the ArrayList. Your first code is running forever because the outer for loop condition is 'Always True'. Since you are adding elements to plusArray, so the size of the plusArray is increasing with every addition and hence 'i' is always less than it. As a result the condition never fails and the program runs forever. Tip: Try to first merge the list and then from the merged list remove the duplicate elements. :)