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1. Create a doubly-linked list of string and add the following methods Add at the head b. Add at the tail Remove from head Remove from tail

1. Create a doubly-linked list of string and add the following methods Add at the head b. Add at the tail Remove from head Remove from tail

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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1. Create a doubly-linked list of string and add the following methods Add at the head b. Add at the tail Remove from head 4. Remove from tail <Display the linked list Step 1: Create a class with name "DNode" as follows: public class DNode { //Start of class Link String e; // AddDNode "next" //Add DNode "prev" //write 3 argument constructor // write all setters and getters } Step 2: Create a class with name "DLL" as follows: public class DLL { //Start of class Link DNode header; // this is pointing to head DNode trailer, // this is pointing to tail int size; // keep record of the size of list Step 3: Add Tail method Step 4: Add Remove Head method public void RemoveHead() { DNode t-header.next; header.set_next(t.next); t.next.set_prev(header); t.set_next(null); t.set_prev(null); size--; } Step 5: Add Remove Tail Method Step 6: Add ShowDLL method to print screen Step 7: Write a test class with the name "TestDLL" and test your code by adding, deleting nodes.
Transcribed Image Text:1. Create a doubly-linked list of string and add the following methods Add at the head b. Add at the tail Remove from head 4. Remove from tail <Display the linked list Step 1: Create a class with name "DNode" as follows: public class DNode { //Start of class Link String e; // AddDNode "next" //Add DNode "prev" //write 3 argument constructor // write all setters and getters } Step 2: Create a class with name "DLL" as follows: public class DLL { //Start of class Link DNode header; // this is pointing to head DNode trailer, // this is pointing to tail int size; // keep record of the size of list Step 3: Add Tail method Step 4: Add Remove Head method public void RemoveHead() { DNode t-header.next; header.set_next(t.next); t.next.set_prev(header); t.set_next(null); t.set_prev(null); size--; } Step 5: Add Remove Tail Method Step 6: Add ShowDLL method to print screen Step 7: Write a test class with the name "TestDLL" and test your code by adding, deleting nodes.
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