Important Notice:

Practice-It will be discontinued as of November 1st, 2024. After this date, the website will remain online for a transitional period, but login will be restricted to University of Washington NetID authentication. This marks the next phase towards the platform's full retirement. Thank you for your use and support of the application over the years.

If you are looking for an alternative, a similar tool, CodeStepByStep, was developed independently by the original author of Practice-It, and is available at codestepbystep.com**

logo Practice-It logo

Main Page → Problems → Solve a Problem

removeFront

Related Links:
Author: Stuart Reges (on 2014/02/13)

Write a method called removeFront that takes an integer n as a parameter and that removes the first n values from a list of integers. For example, if a variable called list stores this sequence: 

        [8, 17, 9, 24, 42, 3, 8]

and the following call is made: 

        list.removeFront(4);

then it should store the following values after the call: 

        [42, 3, 8]

Notice that the first four values in the list have been removed and the other values appear in the same order as in the original list.

You are writing a method for the ArrayIntList class discussed in lecture: 

        public class ArrayIntList {
            private int[] elementData; // list of integers
            private int size;          // current # of elements in the list

            <methods>
        }

Your method should throw an IllegalArgumentException if the parameter n is less than 0 or greater than the number of elements in the list. You are not to call any other ArrayIntList methods to solve this problem, you are not allowed to define any auxiliary data structures (no array, ArrayList, etc), and your solution must run in O(n) time where n is the length of the list.

Type your solution here:


This is a partial class problem. Submit code that will become part of an existing Java class as described. You do not need to write the complete class, just the portion described in the problem.

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.