4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 22 import java.util.Scanner; public class Multiply { // method multiply that returns product of two integers public static int multiply(int x, int y) { return x*y; } Run | Debug public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int x; // prompt user for an integer value x System.out.print(s: "Enter an integer value for x: "); x = scanner.nextInt(); // make a call to multiply and report x doubled // System.out.println("x doubled is: " + multiply(x, 2)) } scanner.close();

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 22 import java.util.Scanner; public class Multiply { // method multiply that returns product of two integers public static int multiply(int x, int y) { return x*y; } Run | Debug public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int x; // prompt user for an integer value x System.out.print(s: "Enter an integer value for x: "); x = scanner.nextInt(); // make a call to multiply and report x doubled // System.out.println("x doubled is: " + multiply(x, 2)) } scanner.close();

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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public class TestAverage {public static void main(String[] args) {int test1, test2, test3, sum;Scanner reader = new Scanner(System.in);System.out.println("Enter test 1");test1 = reader.nextInt();System.out.println("Enter test 2");test2 = reader.nextInt();System.out.println("Enter test 3");test3 = reader.nextInt();sum = test1 + test2 + test3;System.out.println("The sum is " + sum);System.out.println("The average is " + sum / 3);}}There is one logic error in this code explain what is wrong and how to fix it.
import java.util.Scanner; public class MealEstablishmentDirectory { public static void main (String[] args) { Scanner scnr = new Scanner(System.in); int newRating; String newState; MealEstablishment mealEstablishment1 = new MealEstablishment(); System.out.println("Default values: "); mealEstablishment1.print(); newRating = scnr.nextInt(); newState = scnr.next(); mealEstablishment1.setRating(newRating); mealEstablishment1.setState(newState); System.out.println("After mutator methods: "); mealEstablishment1.print(); } }
12345678901 2 public class BMICalculation { 3- Y 10 import java.util.Scanner; 11 12 13 } public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.print("Enter your weight in pounds") in.nextInt (); System.out.print("Enter your height in inches") in.nextDouble(); double feet BMI bmi new BMI (weight, feet); System.out.println("BMI: } int weight w +bmi.getBMI()); System.out.println(bmi.getStatus()); line 9 i got two errors saying cannot find symbol
import java.util.Scanner; public class CharMatch { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); String userString; char charToFind; int strIndex; userString = scnr.nextLine(); charToFind = scnr.next().charAt(0); strIndex = scnr.nextInt(); /* Your code goes here */ }}
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Code example 2-1import java.util.Scanner;public class InvoiceApp {public static void main(String[] args) {Scanner sc = new Scanner(System.in);String choice = “y”;While (choice.equals(“y”)) {System.out.print("Enter subtotal: ");double subtotal = sc.nextDouble();double salesTax = subtotal * .0875;double invoiceTotal = subtotal + salesTax;String message = “Subtotal = ” + subtotal + “\n”+ “ Sales tax = ” + salesTax + “\n”+ “Invoice total = ” + invoiceTotal + “\n\n”System.out.println(message);System.out.print(“Continue? Enter y or n: ”);Choice = sc.next();}}}38. (Refer to code example 2-1.) If the user enters “Y” when asked if he/she wants to continue, the application will a. repeat the while loop b. display a blank line, then repeat the while loop c. End
StringFun.java import java.util.Scanner; // Needed for the Scanner class 2 3 /** Add a class comment and @tags 4 5 */ 6 7 public class StringFun { /** * @param args not used 8 9 10 11 12 public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Please enter your first name: "); 13 14 15 16 17 18 System.out.print("Please enter your last name: "); 19 20 21 //Output the welcome message with name 22 23 24 //Output the length of the name 25 26 27 //Output the username 28 29 30 //Output the initials 31 32 33 //Find and output the first name with switched characters 34 //All Done! } } 35 36 37
import java.util.Scanner; public class StudentScores { public static void main (String [] args) { Scanner scnr = new Scanner(System.in); final int SCORES_SIZE = 4; int[] lowerScores = new int[SCORES_SIZE]; int i; for (i = 0; i < lowerScores.length; ++i) { lowerScores[i] = scnr.nextInt(); } for (i = 0; i < lowerScores.length; ++i) { System.out.print(lowerScores[i] + " "); } System.out.println(); } }
import java.util.Scanner; public class TriangleArea { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); Triangle triangle1 = new Triangle(); Triangle triangle2 = new Triangle(); // TODO: Read and set base and height for triangle1 (use setBase() and setHeight()) // TODO: Read and set base and height for triangle2 (use setBase() and setHeight()) System.out.println("Triangle with smaller area:"); // TODO: Determine smaller triangle (use getArea()) // and output smaller triangle's info (use printInfo()) }} public class Triangle { private double base; private double height; public void setBase(double userBase){ base = userBase; } public void setHeight(double userHeight) { height = userHeight; } public double getArea() { double area = 0.5 * base * height; return area; } public void printInfo() { System.out.printf("Base:…
Code example 2-1import java.util.Scanner;public class InvoiceApp {public static void main(String[] args) {Scanner sc = new Scanner(System.in);String choice = “y”;While (choice.equals(“y”)) {System.out.print("Enter subtotal: ");double subtotal = sc.nextDouble();double salesTax = subtotal * .0875;double invoiceTotal = subtotal + salesTax;String message = “Subtotal = ” + subtotal + “\n”+ “ Sales tax = ” + salesTax + “\n”+ “Invoice total = ” + invoiceTotal + “\n\n”System.out.println(message);System.out.print(“Continue? Enter y or n: ”);Choice = sc.next();}}} (Refer to code example 2-1.) If the user enters 100 the first time the while loop is executed, what will the program display at the console? a. Subtotal: 100.0 Sales tax: 8.75 Invoice total: 108.75 b. Subtotal = 100.0 Sales tax = 8.75 Invoice total = 108.75 c. Subtotal = 100.0 Sales tax = 8.75Invoice total = 108.75 d. Subtotal = 100.0 Sales tax = 8.75Invoice total = 108.75
public int getPowerUse(){ return super.getPowerUse() + contents * powerRating; //////////////////////////////////////////////// if (args[0].equals("REFRIGERATOR")) { String manufacturer = args[1]; String serialNo = args[2]; int basePower = Integer.parseInt(args[3]); int powerRating =Integer.parseInt(args[4]); int capacity = Integer.parseInt(args[5]); Refrigerator rf=new Refrigerator(manufacturer,serialNo, basePower, powerRating, capacity); things[rf.getId()]=rf; returnval = rf.getId(); }
Fix the errors and send the code please // Application allows user to enter a series of words // and displays them in reverse order import java.util.*; public class DebugEight4 { public static void main(String[] args) { Scanner input = new Scanner(System.in); int x = 0, y; String array[] = new String[100]; String entry; final String STOP = XXX; StringBuffer message = new StringBuffer("The words in reverse order are\n"); System.out.println("Enter any word\n" + "Enter + STOP + when you want to stop"); entry = input.next(); while(!(entry.equals(STOP))) { array[x] = entry; ++x; System.out.println("Enter another word\n" + "Enter " + STOP + " when you want to stop"); entry = input.next(); } for(y = x - 1; y > 0; ++y) { message.append(array[y]); message.append("\n"); } System.out.println(message) }