logo Practice-It logo

Main Page → Problems → Solve a Problem

ArrayListMystery

Language/Type: Java ArrayList Collections mystery
Author: Marty Stepp (on 2011/02/16)

Consider the following method:

public static void mystery(ArrayList<Integer> list) {
    for (int i = 0; i < list.size(); i++) {
        int n = list.get(i);
        if (n % 10 == 0) {
            list.remove(i);
            list.add(n);
        }
    }
    System.out.println(list);
}

Write the output produced by the method when passed each of the following ArrayLists:

[1, 20, 3, 40]
[80, 3, 40, 20, 7]
[40, 20, 60, 1, 80, 30]

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.