Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

In java, write a program that reads a list of students ( first names only ) from a file. It is possible for the names

In java, write a program that reads a list of students (first names only) from a file. It is possible for the names to be in unsorted order in the file but they have to be placed in sorted order within the linked list. 3 classes: Node (for instance methods and variables), Doubly (for instance methods and variables), Driver (for static methods).
The program should use a doubly linked list.
Each node in the doubly linked list should have the students name, a pointer to the next student, and a pointer to the previous student. Here is a sample visual. The head points to the beginning of the list. The tail points to the end of the list.
When inserting consider all the following conditions:
if(!head){//no other nodes
}else if (strcmp(data, head->name)<0){//smaller than head
}else if (strcmp(data, tail->name)>0){//larger than tail
}else{//somewhere in the middle
}
When deleting a student consider all the following conditions:
student may be at the head, the tail or in the middle
Below, you will find a sample of what the file looks like. Notice the names are in unsorted order but the information placed in the linked list (above visual) is in sorted order. The name of the file should be input.txt.
In the text file, the word delete followed by a name, should delete the node with that specific students name from the doubly linked list. If the name is not found, then nothing is deleted.
(NOTE: The above visual represents only the first three lines from the text file below.)
Jim
jill
John
delete jill
Bob
Jack
delete jim
At the end of the program, traverse through the contents of the linked list in both ascending and descending order, using the doubly linked list, and write the contents into the file output.txt. For example, given the above list, here is the sample display:
Bob
Jack
John
=============
John
Jack
Bob

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Database 101

Authors: Guy Kawasaki

1st Edition

0938151525, 978-0938151524

More Books

Students also viewed these Databases questions