Answered: This import statement…

Engineering

Computer Science

This import statement java.util.Scanner; is necessary to receive input from a user True False

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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The following code is in Java: // Assume inputFile references a Scanner object. try { input = inputFile.nextInt(); } finally { inputFile.close(); } catch (InputMismatchException e) { System.out.println(e.getMessage()); } 1)What is the issue with this code?2) How can it be fixed?
What is the output printed by writeln statement if the parameter passing mechanism is call by value? Answer :- 8, 2, 3, 3 Need explanation for Answer
can you please make so i can copy and past it and if you have to use a form can you use java.util.scanner form. thx. Below is a sample implementation of StoreSalesBarChart package assignment5; import java.io.FileNotFoundException; /** * StoreSalesBarChart * @author JunS * */ public class StoreSalesBarChart { String storeName; double storeSales; /** * StoreSalesBarChart constructor * @param sName */ public StoreSalesBarChart(String sName) { storeName = sName; storeSales = 0; } /** * addStoreSales * @param txn */ public void addStoreSales(double txn) { storeSales += txn; } /** * getStoreSales * @return */ public double getStoreSales() { return storeSales; } public void displayBarChart() { System.out.print(storeName + ": "); for (int i=0; i<storeSales/100; i++) { System.out.print("*"); } System.out.println(""); } public String getBarChartString() { String barChartString = storeName + ": "; for (int i=0; i<storeSales/100; i++) { barChartString += "*"; } return barChartString; }…
there are 2 errors in this code can you fix it for me? public class Exercise09_10 { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter a, b, c: "); double a = input.nextDouble(); double b = input.nextDouble(); double c = input.nextDouble(); QuadraticEquation equation = new QuadraticEquation(a, b, c); double discriminant = equation.getDiscriminant(); if (discriminant < 0) { System.out.println("The equation has no roots"); } else if (discriminant == 0) { System.out.println("The root is " + equation.getRoot1()); } else // (discriminant >= 0) { System.out.println("The roots are " + equation.getRoot1() + " and " + equation.getRoot2()); } } }
The files provided in the code editor to the right contain syntax and/or logic errors. In each case, determine and fix the problem, remove all syntax and coding errors, and run the program to ensure it works properly. // Application looks up home price // for different floor plans // allows upper or lowercase data entry import java.util.*; public class DebugEight3 { publicstaticvoidmain(String[] args) { Scanner input =newScanner(System.in); String entry; char[] floorPlans = {'A','B','C','a','b','c'} int[] pricesInThousands = {145,190,235}; char plan; int x, fp =99; String prompt ="Please select a floor plan\n"+ "Our floorPlanss are:\n"+"A - Augusta, a ranch\n"+ "B - Brittany, a split level\n"+ "C - Colonial, a two-story\n"+ "Enter floorPlans letter"; System.out.println(prompt); entry = input.next(); plan = entry.charAt(1); for(x =0; x < floorPlans.length; ++x) if(plan == floorPlans[x]) x = fp; if(fp =99) System.out.println("Invalid floor plan code entered")); else { if(fp…
I need to format the date and time to read out month first then the day then the year but it is not working, what is the correct format? Also my hours are not updating when it runs, why? import java.time.format.DateTimeFormatter; import java.time.LocalDate; import java.util.Scanner; public class Volunteer {private String firstName;private String lastName;private static int startDate;private double volunteerHours;public static final String DEFAULT_FIRST_NAME = "first name not assigned";public static final String DEFAULT_LAST_NAME = "last name not assigned";public static final LocalDate DEFAULT_START_DATE = LocalDate.now();public static final double DEFAULT_HOURS = 0; public Volunteer(String firstName, String lastName, int startDate2, double volunteerHours) {// TODO Auto-generated constructor stub} public String getFirstName() {return firstName;} public void setFirstName(String firstName) {if (firstName != null && firstName.length() >0 )this.firstName = firstName;} public…
Write code that outputs variable numDays as follows. End with a newline. Ex: If the input is: the output is: Days: 3 1 import java.util.Scanner; 2 3 public class OutputTest { public static void main (String [] args) { int numDays; 4 6. // Our tests will run your program with input 3, then run again with input 6. // Your program should work for any input, though. Scanner scnr = new Scanner(System.in); numDays 7 8 9. 10 scnr.nextInt(); 11 12 /* Your code goes here */ 13 } 15 } 14
Java Program ASAP Modify this program so it passes the test cases in Hypergrade becauses it says 5 out of 7 passed. Also change the program so that for test cases 2 and 3 the numbers are in there correct places as shown in the input files import java.io.*;import java.util.Scanner;public class FileSorting { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(System.in); System.out.println("Please enter the file name or type QUIT to exit:"); while (true) { String input = sc.next(); if (input.equalsIgnoreCase("QUIT")) { break; // Exit the program } else { String filePath = new File("").getAbsolutePath() + "/" + input; File file = new File(filePath); if (file.exists() && !file.isDirectory()) { try (BufferedReader br = new BufferedReader(new FileReader(file))) { String st;…
Add a try block that: • Reads integer colorIntensity from input. • Outputs "Color intensity: " followed by the value of colorIntensity. End with a newline. Ex: If the input is 64, then the output is: Color intensity: 64 Ex: If the input is Ava, then the output is: Error: Input for color intensity cannot be processed 1 import java.util.Scanner; 2 import java.util. InputMismatchException; 3 4 public class ColorIntensity { 5 public static void main(String[] args) { 6 Scanner scnr = new Scanner(System.in); int colorIntensity; 7 8 9 *Your code goes here */ 10 11 12 13 14 15} } catch (InputMismatchException excpt) { System.out.println("Error: Input for color intensity cannot be processed"); }
Help me do the code by follow the descriptions. Import Java Scanner class
In Java: Forms often allow a user to enter an integer. Write a program that takes in a string representing an integer as input, and outputs yes if every character is a digit 0-9. Ex: If the input is: 1995 the output is: yes Ex: If the input is: 42,000 or 1995! the output is: no Hint: Use a loop and the Character.isDigit() function.