Answered: Stream.iterate(new int[] { ®, 1 }, x ->…

Stream.iterate(new int[] { ®, 1 }, x -> new int[] { x[1], (x[1] + x[0]) }).limit(6).forEach(x -> System.out.println(x[0]));

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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Please enter the following code into a Java file. import java.util.*; public class SetDemo { int count[] public static void main(String args[]) { {34, 22,10,60,30,22}; Set unsortedSet = new HashSet(); try { for(int i = 0; i (unsortedSet); System.out.println("The sorted set is: System.out.println("The System.out.println("The catch(Exception e) {} + sorted Set); first element of the set is: "+ (Integer) sorted Set.first()); last element of the set is: "+ (Integer)sortedSet.last()); Run the program to confirm it works as expected. Then, expand the program to do the following steps in order. For each test, display the result of the test to the console.
Implement the build_dictionary() function to build a word frequency dictionary from a list of words. Ex: If the words list is: ["hey", "hi", "Mark", "hi", "mark"] the dictionary returned from calling build_dictionary(words) is: {'hey': 1, 'hi': 2, 'Mark': 1, 'mark': 1} Ex: If the words list is: ["zyBooks", "now", "zyBooks", "later", "zyBooks", "forever"] the dictionary returned from calling build_dictionary(words) is: {'zyBooks': 3, 'now': 1, 'later': 1, 'forever': 1} The main code builds the word list from an input string, calls build_dictionary() to build the dictionary, and displays the dictionary sorted by key value. Ex: If the input is: hey hi Mark hi mark the output is: Mark: 1 hey: 1 hi: 2 mark: 1
Implement the build_dictionary() function to build a word frequency dictionary from a list of words. Ex: If the words list is: ["hey", "hi", "Mark", "hi", "mark"] the dictionary returned from calling build_dictionary(words) is: {'hey': 1, 'hi': 2, 'Mark': 1, 'mark': 1} Ex: If the words list is: ["zyBooks", "now", "zyBooks", "later", "zyBooks", "forever"] the dictionary returned from calling build_dictionary(words) is: {'zyBooks': 3, 'now': 1, 'later': 1, 'forever': 1} The main code builds the word list from an input string, calls build_dictionary() to build the dictionary, and displays the dictionary sorted by key value. Ex: If the input is: hey hi Mark hi mark the output is: Mark: 1 hey: 1 hi: 2 mark: 1
A student record system uses an ArrayList object called studrecs tomaintain a collection of student details where each student is anobject defined by the Student class. The student class has accessormethods getName() and getRegNo()Write a for-each loop that iterates through the studrecs collectionwriting out each student’s name and registration number.
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Create class Test in a file named Test.java. This class contains a main program that performs the following actions: Instantiate a doubly linked list. Insert strings “a”, “b”, and “c” at the head of the list using three Insert() operations. The state of the list is now [“c”, “b”, “a”]. Set the current element to the second-to-last element with a call to Tail() followed by a call to Previous()Then insert string “d”. The state of the list is now [“c”, “d”, “b”, “a”]. Set the current element to past-the-end with a call to Tail() followed by a call to Next(). Then insert string “e”. The state of the list is now [“c”, “d”, “b”, “a”, “e”] . Print the list with a call to Print() and verify that the state of the list is correct.