2}) Write the missing code for the insertBefore-method. The method should insertnewValue directly before the first occurrence of value in the list. It should return true ifsuccessful and false if value does not occur in the list. You may assume value is not null.You may not use any methods not listed.Public class ListNodeE data;ListNode next;public ListNode (E data, ListNode next) {this.data = data:this.next = next;public class LinkedList {int size:ListNode head;public boolean insertBefore (E newValue, E value) {//missing code//other methods not shownpublic class TreeNode()private int value;private List children;Consider the following code for a generic tree of int values. Write the missing code forthe traverse method, which prints the values of all nodes in the subtree rooted at this nodeusing preorder traversal.public void traverse () {//missing codeheadtail//other methods not shownlistNodeListNode Lintnew linked list(iftree23int=Public boolean (int vouvalue== this

“Since you have posted multiple questions, we will provide the solution only to the first question…

Consider the following code for a generic tree of int values. Write the missing code for the traverse method, which prints the values of all nodes in the subtree rooted at this node using preorder traversal. public class TreeNode ( private int value; private List children; public void traverse () { //missing code //other methods not shown de Les (if tree == int Public boolean value= int vi this

Consider the following code for a generic tree of int values. Write the missing code for the traverse method, which prints the values of all nodes in the subtree rooted at this node using preorder traversal. public class TreeNode ( private int value; private List children; public void traverse () { //missing code //other methods not shown de Les (if tree == int Public boolean value= int vi this

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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