•• 8. Write a method that returns the sum of a given row in a two-dimensional array. Complete this code:ArrayUtil.java1 public class ArrayUtil2 {/**Computes the sum of a given row in a two-dimensional array.@param values the array@param the row whose sum to compute@return the sum of the given row*/public static int rowSum(int[][] values, int row){3481011}13 }12RowSumTester.java1 public class RowSumTester2 {public static void main(String[] args){46.int[][] counts ={ 1, 0, 1 },{ 1, 1, 0 },{ 0, 0, 1 },{ 1, 0, 0 },{ 0, 1, 1 },{ 0, 1, 1 },{ 1, 1, 0 }1011121314};int sum = ArrayUtil.rowSum(counts, 5);1516System.out.println(sum);System.out.println("Expected: 2");171819int[][] magicSquare = {{ 16, 3, 2, 13 },{ 5, 10, 11, 8 },{ 9, 6, 7, 12 },{ 4, 15, 14, 1 },};20212223242526for (int row = 0; row <= 3; row++){System.out.println(ArrayUtil. rowSum(magicSquare, row));System.out.println("Expected: 34");}27282930313233 }

PROGRAM: ArrayUtil.java: public class ArrayUtil { /** Computes the sum of a given row in a…

Answered: •• 8. Write a method that returns the…

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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Write in java code Create an array myArr of 10 integer elements and initialize/fill it with numbers (not sorted) between 0 and 20; for example myArr = [ 12, 3, 19, 5, 7, 11,….etc.]. (a) print the array. (b) Use method sort() of class Arrays to sort myArr and print it after sorting. (c) Use the arraycopy() method of class System to copy myArr to another array called my2ndArr, then print both arrays. (d) use method equals() of class Arrays between the two arrays and print the results. (e) use method fill() to fill my2ndArr with 99 in all elements and then use method equals()and print the result whether the two arrays are equal or not. (f) use the method binarySearch() to search myArr for the value 15 and print the result
Problem (class MergeSalary)First, write a Java method merge that takes as parameter a non-empty double array representingemployees’ salaries. The method merges the values of every 2 adjacent elements. put themerged values at the beginning of the array, and put 0 in the remaining positions. Suppose thatthe original array will contain an even number of elements.Second, write two java methods readArray(int[]a) and printArray(int[]a) thatreads/writes the elements of an array passed in parameter from/to the standard input/output.Finally, Use the following main method to test your different methods:public class MergeSalary{ private static Scanner input = new Scanner(System.in); public static void main(String[] args) { double[] salaries = new double[10]; System.out.print("Enter 10 salaries: "); readArray(salaries); merge(salaries); System.out.print("Salaries after merge: "); printArray(salaries); }}
Find a duplicate (20 points). Write a program FindDuplicate.java that reads n integer arguments from the command line into an integer array of length n, where each value is between is 1 and n, and displays true if there are any duplicate values, false otherwise. java FindDuplicate 2 10 8 5 4 1 3 6 7 9 false java FindDuplicate 4 5 2 1 2 true
(Java) Q2 explain the answers to the below questions using step-by-step explanation. Fill in the missing line of code for the remove method for an array: public static void remove(int array[], int numElements, int indexToRemove) { for (int i = indexToRemove; i < numElements - 1; i++) { //fill in the missing line here } return;}
in java Create two arrays with same length n: - Array A with integer numbers that user will insert- Array B with random numbers from 0 to 100.- Find sum of both arrays,- Find maximum values of both array and compare them: .if maximum of 1 st is lower then maximum of 2nd array: print sums of both arrays.if maximum of 1st is greater then maximum of 2nd array print 2nd array (use println)otherwise print first array in reverse.
Program71.java Write a program that creates a 32-element array of random integers all from 1 to 100, inclusive. Then execute a custom method with the array as its only argument. The method should begin by using a loop to print the array elements in 4 rows and 8 columns, with all columns being five characters wide. Duplicates are okay. This same loop should determine how many integers in the array are odd numbers. After this loop ends, use this figure to declare a new array of integers named odds. Process the array again in the method, but this time with a foreach loop, and add the odd integers to the odds array. Return the odds array back to main. In main, report the size of the array and sort it ascending. Finally use a while loop to print the odd integers all on one line separated by spaces.Program72.java See Section 7.13 and watch the Command Line Arguments (2:08) video (video image below). Then, write a program that takes two double command line arguments representing the sides of…
Program71.java Write a program that creates a 32-element array of random integers all from 1 to 100, inclusive. Then execute a custom method with the array as its only argument. The method should begin by using a loop to print the array elements in 4 rows and 8 columns, with all columns being five characters wide. Duplicates are okay. This same loop should determine how many integers in the array are odd numbers. After this loop ends, use this figure to declare a new array of integers named odds. Process the array again in the method, but this time with a foreach loop, and add the odd integers to the odds array. Return the odds array back to main. In main, report the size of the array and sort it ascending. Finally use a while loop to print the odd integers all on one line separated by spaces. Program73.java In main: Declare an array capable of holding five first names. Populate the array in a for loop by entering five first names all on one line separated by spaces. sort the array…
#5. Using the concept ArrayList, write a Java program that will take 10 integer inputs fromuser and print the following: number of positive numbers, number of negative numbers, number of oddnumbers, number of even numbers, number of 0s. Note: 0 is not considered a positive number.ClassName: ArrayListArraySearchSample Input/OutputEnter values of the Array List-9-81005608-1214Number of positive numbers: 7Number of negative numbers: 3Number of odd numbers:2Number of even numbers: 6Number of 0s: 2 Machine Problem #6. Consider an integer ArrayList, the number of elements in which isdetermined by the user. The elements are also taken as input from the user. Get the sum of allodd numbers and sum of all inputted valuesClass Name: ArrayListSumofNumbersSample Input/OutputEnter the length of the ArrayList: 5The value of an ArrayList at index 0: 15The value of an ArrayList at index 1: 14The value of an ArrayList at index 2: 13The value of an ArrayList at index 3: 12The value of an ArrayList at…
(Java) question 4 Complete the following method to insert a value into an array: public static void insert(String array[], int numElements, int indexToInsert, String newValue) { if (array.length == numElements) { System.out.println("Array is full. No room to insert."); return; } //start at end and work backwards shifting names down for (int i = numElements; i > indexToInsert; i--) { //fill in the missing line here } array[indexToInsert] = newValue;} Group of answer choices array[i - 1] = array[i]; array[i] = array[indexToInsert]; array[indexToInsert] = array[i]; array[i] = array[i - 1]; array[i] = array[i + 1];
(Java) Q3 explain the answers to the below questions using step-by-step explanation. Fill in the missing line of code for the insert method for an array: public static void insert(String array[], int numElements, int indexToInsert, String newValue) {if (array.length == numElements) {System.out.println("Array is full. No room to insert.");return;}for (int i = numElements; i > indexToInsert; i--) {//fill in the missing line of code here}array[indexToInsert] = newValue;}
Part 1: 1. Write a Java program called Numbers1 that reads 10 integer numbers from the user and displaysthem in reverse order to the way they were scanned.Hint: Use an array to store the 10 integers.2. Generalize the above program, so it reads any number of integer numbers (instead of 10 integernumbers).Hint: promote the user to enter the size (length) of the array. Part 2: Write a Java program called Numbers2 that that reads 10 real (double) numbers from the user, and thenit should find and display the average of the array elements, the largest number and the smallestnumber.Hint: Use an array to store the 10 numbers.
import java.util.Scanner; public class ModifyArray { public swapArrayEnds(10, 20, 30, 40) { for (i = 0; i < (arrVals.length / 2); ++i) { tempValue = arrVals[i]; // Do swap //*please fix code// arrVals[i] = arrVals[arrVals.length - 1 - i]; arrVals[arrVals.length - 1 - i] = tempValue; Write a method swapArrayEnds() that swaps the first and last elements of its array parameter. Ex: sortArray = {10, 20, 30, 40} becomes {40, 20, 30, 10}. public static void main (String [] args) { Scanner scnr = new Scanner(System.in); int numElem = 4; int[] sortArray = new int[numElem]; int i; int userNum; for (i = 0; i < sortArray.length; ++i) { sortArray[i] = scnr.nextInt(); } swapArrayEnds(sortArray); for (i = 0; i < sortArray.length; ++i) { System.out.print(sortArray[i]); System.out.print(" "); } System.out.println(""); }}

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