Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
11th Edition
ISBN: 9780134743356
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 6, Problem 18.1E
Program Plan Intro
Perfect number
Program Plan:
- Import required packages.
- Declare the class “PerfectNumber”.
- Define the main method.
- Traverse the “for” loop to get the perfect number.
- Call the method “isPerfect()”.
- Check whether “res” is not equal to “null”.
- Print the result.
- Definition of method “isPerfect()”.
- Assign the “factor” value to “1”.
- Assign the “fac” to “1”.
- Check the condition using “for loop.
- Check whether the “num” mod “i” equals to “0”.
- Assign the factors with the value of “i”.
-
- Check whether the “factor” equals to “num”.
- Return the “factors”.
- Return “null”.
- Check whether the “factor” equals to “num”.
- Check whether the “num” mod “i” equals to “0”.
- Traverse the “for” loop to get the perfect number.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
a) Write a boolean method called sumDivisibleByFive that returns true if the sum of the digits of its integer
parameter is divisible by 5 and false otherwise. For example, if the parameter passed to the method is 73
then the sum of its digits is 10 (7+3) The method should return true since 10 is divisible by 5.
b) Write a main method that calls the method sumDivisibleByFive for the values between 10 and 100
inclusive 10 per line. This should output the following numbers:
14 19 23 28 32 3741 46 50 55
64 69 73 78 82 87 91 96
Method overloading: given the following methods, write down the printed output of the method calls.
a) Write a boolean method called productDivisibleByThree that returns true if the product of the digits of
its integer parameter is divisible by 3 and false otherwise. For example, if the value passed to the method
is 23 then the product of its digits is 6 (2*3). The method should retum true since 6 is divisible by 3.
b) Write a main method that calls the method productDivisibleByThree for the values between 10 and 50
inclusive 10 per line. This should output the following numbers:
10 13 16 19 20 23 26 29 30 31
Using java
32 33 34 35 36 37 38 39 40 43
46 49 50
Chapter 6 Solutions
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
Ch. 6 - A method is invoked with a(n)Ch. 6 - Prob. 1.2SRECh. 6 - Prob. 1.3SRECh. 6 - The keywordindicates that a method does not return...Ch. 6 - Prob. 1.5SRECh. 6 - Prob. 1.6SRECh. 6 - Prob. 1.7SRECh. 6 - An object of classproduces truly random numbers.Ch. 6 - Prob. 1.9SRECh. 6 - Prob. 1.10SRE
Ch. 6 - Prob. 1.11SRECh. 6 - Prob. 1.12SRECh. 6 - For the class Craps in Fig. 6.8, state the scope...Ch. 6 - the variable die1.Ch. 6 - the method rollDice.Ch. 6 - Prob. 2.4SRECh. 6 - Prob. 2.5SRECh. 6 - Write an application that tests whether the...Ch. 6 - Prob. 4.1SRECh. 6 - Method smallest, which takes three integers x, y...Ch. 6 - Prob. 4.3SRECh. 6 - Method intToFloat, which takes integer argument...Ch. 6 - Find the error in each of the following program...Ch. 6 - 1 int sum(int x, int y) { 2 int result; 3 result =...Ch. 6 - 1 void f(float a); { 2 float a; 3...Ch. 6 - 1 void product() { 2int, a = 6; 3int b = 5; 4int c...Ch. 6 - Declare method sphereVolume to calculate and...Ch. 6 - What is the value of x after each of the following...Ch. 6 - What is the value of x after each of the following...Ch. 6 - What is the value of x after each of the following...Ch. 6 - What is the value of x after each of the following...Ch. 6 - What is the value of x after each of the following...Ch. 6 - What is the value of x after each of the following...Ch. 6 - What is the value of x after each of the following...Ch. 6 - (Parking Charges) A parking garage charges a 2.00...Ch. 6 - (Rounding Numbers) Math.floor can be used to round...Ch. 6 - To round numbers to specific decimal places, use a...Ch. 6 - Prob. 5.1ECh. 6 - Write statements that assign random integers to...Ch. 6 - Write statements that will display a random number...Ch. 6 - (Exponentiation) Write a method integer Power...Ch. 6 - Define a method hypotenuse that calculates the...Ch. 6 - Prob. 10.1ECh. 6 - Prob. 11.1ECh. 6 - (Displaying a Square of Asterisks) Write a method...Ch. 6 - (Displaying a Square of Any Character) Modify the...Ch. 6 - Prob. 14.1ECh. 6 - (Separating Digits) Write methods that accomplish...Ch. 6 - (Separating Digits) Write methods that accomplish...Ch. 6 - Prob. 15.3ECh. 6 - (Temperature Conversions) Implement the following...Ch. 6 - Method fahrenheit returns the Fahrenheit...Ch. 6 - Prob. 16.3ECh. 6 - (Find the Minimum) Write a method minimum3 that...Ch. 6 - Prob. 18.1ECh. 6 - (Prime Numbers) A positive integer is prime if its...Ch. 6 - Prob. 20.1ECh. 6 - (Greatest Common Divisor) The greatest common...Ch. 6 - Write a method qualityPoints that inputs a...Ch. 6 - Write an application that simulates coin tossing....Ch. 6 - (Guess the Number) Write an application that plays...Ch. 6 - Prob. 25.1ECh. 6 - Prob. 26.1ECh. 6 - (Craps Game Modification) Modify the craps program...Ch. 6 - (Table of Binary, Octal and Hexadecimal Numbers)...Ch. 6 - (Computer-Assisted Instruction) The use of...Ch. 6 - Prob. 2MDCh. 6 - Prob. 3MDCh. 6 - (Computer-Assisted Instruction: Difficulty Levels)...
Knowledge Booster
Similar questions
- (Difficulty Level 3)In the game Flick Fleet, players undertake space combat by flicking a six sided die at other ships. There is an object called SpaceShip, where ships have a type corresponding to: Destroyer, Cruiser, Bomber, or Fighter. This object has a method called: get_ship_type(): Returns a string that corresponds to the type of ship (e.g. "Destroyer", "Cruiser", "Bomber" or "Fighter") Each ship has different regions that have a corresponding number between 1 and 5. Fighter - Hull (1), Engines (2) Bomber - Hull (1), Engines (2), Shield Generator (3) Cruiser - Hull (1), Engines (2), Shield Generator (3), Defense Grid (4) Destroyer - Hull (1), Engines (2), Shield Generator (3), Defense Grid (4), Engineering (5) Write a function called laser_attack that takes in as its parameters a ship of type Ship, and an integer value between 1 and 6. This function should return true if the number passed in the second parameter corresponds to a region possessed by the ship…arrow_forwardPrime Numbers A prime number is a number that can be evenly divided by only itself and 1. For example, the number 5 is prime because it can be evenly divided by only 1 and 5. The number 6, however, is not prime because it can be evenly divided by 1, 2, 3, and 6. Write a Boolean method named IsPrime that takes an integer as an argument and returns true if the argument is a prime number or false otherwise. Use the method in an application that lets the user enter a number and then displays a message indicating whether the number is prime.arrow_forwardMethod: sumOdds(value: int): This method will sum all the odd values from 1 upto the value passed by parameter. This will display the sumas an integer value.Method: characterCount(phrase: str): This method will count the number of characters in the phrase that is passed by parameter. You cannot useany built in function ( ie len() ) and must use a looping activity. This should display the number of characters inthe phrase as an integerMethod: multiplicationPractice(): This method is to practice simple multiplication problems. The program should randomly generate twonumbers from 1-10 for the user to multiply. It should display the multiplication problem and allow the user toanswer the problem. It should display if the user got the answer correct or incorrect. The activity shouldcontinue until the user has gotten 3 different practice problems correct.Method: order(value1: int, value2: int, value3: int): This method is to order the 3 passed value from least to greatest. It should display…arrow_forward
- Here's the problem " (Math: approximate the square root) There are several techniques for implementingthe sqrt method in the Math class. One such technique is known as theBabylonian method. It approximates the square root of a number, n, by repeatedlyperforming a calculation using the following formula: nextGuess = (lastGuess + n / lastGuess) / 2 When nextGuess and lastGuess are almost identical, nextGuess is theapproximated square root. The initial guess can be any positive value (e.g., 1).This value will be the starting value for lastGuess. If the difference betweennextGuess and lastGuess is less than a very small number, such as 0.0001,you can claim that nextGuess is the approximated square root of n. If not, next-Guess becomes lastGuess and the approximation process continues. Implementthe following method that returns the square root of n.public static double sqrt(long n)" I have my java code here " import java.util.Scanner;public class Main2 {public static void main(String[]…arrow_forwardCode in C# (OOP Concept) Do a program that does the following: Ask for a number from the user in the main method o Pass thenumber to a method call it "Multiplication”. In the Method Multiplication, multiply the number by a number enteredby the user (mention that the number should be positive). Send the result back to the main and print it from the mainModify the previous program if the user enters a negative second number in the method Multiplication, do not acceptthe number and ask the user to reenter it again. . Add another method call it also Multiplication Ask for a float numberfrom the main and send it to the new Multiplication. This method should also ask for another positive number fromthe user and multiply it by the float number. Design and implement a function called "multiply" in C++ that accepttwo numbers and returns either the arithmetic multiplication or repetition of a given string a specific number of timesdepending on the data types of the argument values. The…arrow_forward2) Two integers are said to be relatively prime if their greatest common divisor (GCD) is one. For example 12 and 13 are relatively prime, but 12 and 14 are not. a. Write a method called relativelyPrime that accepts two integer parameters A and B. The method should output if A, and B are relatively prime or nat. Use the following method header: public static void relativelyPrime(int A, int B) b. Write a test program (main) to test the method by asking the user to input two positive integers X and Y. Then the program will call the method relativelyPrime to output if X and Y are relatively prime or not. Sample Run 1: Enter Two positive integers X and Y: 12 13 12 and 13 are relatively prime Sample Run 2: Enter Two positive integers X and Y: 12 14 12 and 14 are not relatively primearrow_forward
- in the programming language java write a method that returns the biggest digit of an integer number. (parameter of the method)arrow_forwardtask4-Change Summation Integers problem to Finding the minimumproblem. Make sure you properly wrote/updated all text messages, method names,and math calculations.Hint: You can use java.lang.Math.min() method.Example: System.out.printf("The min of the integers %4d and %4d and %4dis %7d\n", a, b, c, MinTest(a, b, c));Submit the source code files (.java files) and the console output screenshotsarrow_forwardFree Response Question: 28. Write a method that will return true if a randomly generated number between 1 and 10 is less than or equal to 4. public static boolean FortyPercentOrLess() { }arrow_forward
- True or False The versions of an overloaded method are distinguished by the number, type, and order of their parameters.arrow_forwardLanguage:Java - Requests two double values from the user and stores them in local variables in main() - Create a method which takes these two values as parameters- The method will use Math library functions to: o Print the square root of the 1st parametero Print the log of the 2nd parametero Print the value of the 1st parameter raised to the power of the 2nd parameterarrow_forwardCreate a method that takes a value and tell whether it is null or not.Declared as: boolean isZero (float a)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education