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

BJP4 Exercise 16.19: rotate

Related Links:
Author: Whitaker Brand (on 2016/09/08)

Write a method rotate that moves the value at the front of a list of integers to the end of the list. For example, if a variable called list stores the following sequence of values: 

[8, 23, 19, 7, 45, 98, 102, 4]

Then the call of list.rotate(); should move the value 8 from the front of the list to the back of the list, yielding this sequence of values: 

[23, 19, 7, 45, 98, 102, 4, 8]

The other values in the list should retain the same order as in the original list. If the method is called for a list of 0 or 1 elements it should have no effect on the list. You are not allowed to construct any new nodes to solve this problem and you are not allowed to change any of the integer values stored in the nodes. You must solve the problem by rearranging the links of the list.

Assume that you are adding this method to the LinkedIntList class as defined below: 

public class LinkedIntList {
    private ListNode front;   // null for an empty 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.