Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 7, Problem 7.8PE
(Average an array) Write two overloaded methods that return the average of an array with the following headers:
public static int average(int[] array)
public static double average(double[] array)
Write a test
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
RetailItem Class
Write a class named Retailltem that holds data about an item in a retail store. The class
should have the following fields:
• description. The description field references a String object that holds a brief
description of the item.
• unitsOnHand. The unitsOnHand field is an int variable that holds the number of units
currently in inventory.
• price. The price field is a double that holds the item's retail price.
Write a constructor that accepts arguments for each field, appropriate mutator methods
that store values in these fields, and accessor methods that return the values in these fields.
Once you have written the class, write a separate program that creates three RetailItem
objects and stores the following data in them:
Description
Units on Hand
Price
Item #1
Jacket
12
59.95
Irem #2
Designer Jeans
34.95
[rem #3
Shirt
24.95
Exercise (Array and Method): Write a method called arrayToString(), which takes an int array and return a String in the form of {a1, a2, ..., an}. Take note that there is no comma after the last element. The method's signature is as follows:
public static String arrayToString(int[] array)
Also write a test driver to test this method (you should test on empty array, one-element array, and n-element array).
Notes: This is similar to the built-in function Arrays.toString(). You could study its source code.
Exercise (Array and Method): Write a boolean method called contains(), which takes an array of int and an int; and returns true if the array contains the given int. The method's signature is as follows:
public static boolean contains(int[] array, int key)
Also write a test driver to test this method.
Exercise (Array and Method): Write a method called search(), which takes an array of int and an int; and returns the array index if the array contains the given int; or -1 otherwise. The…
Write the following methodthat tests whether the array has four consecutive numbers with the same value:public static boolean isConsecutiveFour(int[] values)Write a test program that prompts the user to enter a series of integers and displaysit if the series contains four consecutive numbers with the same value. Yourprogram should first prompt the user to enter the input size—i.e., the number ofvalues in the series. Here are sample runs:
Enter the number of values: 8↵EnterEnter the values: 3 4 5 5 5 5 4 5↵EnterThe list has consecutive foursEnter the number of values: 9↵EnterEnter the values: 3 4 5 5 6 5 5 4 5↵EnterThe list has no consecutive fours
Chapter 7 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 7.2 - Prob. 7.2.1CPCh. 7.2 - Prob. 7.2.2CPCh. 7.2 - What is the output of the following code? int x =...Ch. 7.2 - Indicate true or false for the following...Ch. 7.2 - Which of the following statements are valid? a....Ch. 7.2 - Prob. 7.2.6CPCh. 7.2 - What is the array index type? What is the lowest...Ch. 7.2 - Write statements to do the following: a. Create an...Ch. 7.2 - What happens when your program attempts to access...Ch. 7.2 - Identify and fix the errors in the following code:...
Ch. 7.2 - What is the output of the following code? 1....Ch. 7.4 - Will the program pick four random cards if you...Ch. 7.5 - Use the arraycopy method to copy the following...Ch. 7.5 - Prob. 7.5.2CPCh. 7.7 - Suppose the following code is written to reverse...Ch. 7.8 - Prob. 7.8.1CPCh. 7.8 - Prob. 7.8.2CPCh. 7.9 - Prob. 7.9.1CPCh. 7.9 - Prob. 7.9.2CPCh. 7.10 - If high is a very large integer such as the...Ch. 7.10 - Prob. 7.10.2CPCh. 7.10 - Prob. 7.10.3CPCh. 7.11 - Prob. 7.11.1CPCh. 7.11 - How do you modify the selectionSort method in...Ch. 7.12 - What types of array can be sorted using the...Ch. 7.12 - To apply java.util.Arrays.binarySearch (array,...Ch. 7.12 - Show the output of the following code: int[] list1...Ch. 7.13 - This book declares the main method as public...Ch. 7.13 - Show the output of the following program when...Ch. 7 - (Assign grades) Write a program that reads student...Ch. 7 - (Reverse the numbers entered) Write a program that...Ch. 7 - (Count occurrence of numbers) Write a program that...Ch. 7 - (Analyze scores) Write a program that reads an...Ch. 7 - (Print distinct numbers) Write a program that...Ch. 7 - (Revise Listing 5.1 5, PrimeNumber.java) Listing...Ch. 7 - (Count single digits) Write a program that...Ch. 7 - (Average an array) Write two overloaded methods...Ch. 7 - (Find the smallest element) Write a method that...Ch. 7 - Prob. 7.10PECh. 7 - (Statistics: compute deviation) Programming...Ch. 7 - (Reverse an array) The reverse method in Section...Ch. 7 - Prob. 7.13PECh. 7 - Prob. 7.14PECh. 7 - 7 .15 (Eliminate duplicates) Write a method that...Ch. 7 - (Execution time) Write a program that randomly...Ch. 7 - Prob. 7.17PECh. 7 - (Bubble sort) Write a sort method that uses the...Ch. 7 - (Sorted?) Write the following method that returns...Ch. 7 - (Revise selection sort) In Listing 7 .8, you used...Ch. 7 - (Sum integers) Write a program that passes an...Ch. 7 - (Find the number of uppercase letters in a string)...Ch. 7 - (Game: locker puzzle) A school bas 100 lockers and...Ch. 7 - (Simulation: coupon collectors problem) Coupon...Ch. 7 - (Algebra: solve quadratic equations) Write a...Ch. 7 - (Strictly identical arrays) The arrays 1ist1 and...Ch. 7 - (Identical arrays) The arrays 1ist1 and 1ist2 are...Ch. 7 - (Math: combinations) Write a program that prompts...Ch. 7 - (Game: pick four cards) Write a program that picks...Ch. 7 - (Pattern recognition: consecutive four equal...Ch. 7 - (Merge two sorted Lists) Write the following...Ch. 7 - (Partition of a list) Write the following method...Ch. 7 - Prob. 7.33PECh. 7 - (Sort characters in a string) Write a method that...Ch. 7 - (Game: hangman) Write a hangman game that randomly...Ch. 7 - (Game: Eight Queens) The classic Eight Queens...Ch. 7 - Prob. 7.37PE
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
For each of the following activities, give a PEAS description of the task environment and characterize it in te...
Artificial Intelligence: A Modern Approach
For each of the following E-R diagrams from Chapter 2 C: Transform the diagram to a relational schema that show...
Modern Database Management (12th Edition)
Figure 1-30 shows the Visual Studio IDE. What are the names of the four areas indicated in the figure? Figure 1...
Starting Out With Visual Basic (7th Edition)
Write a program that accepts two integer values typed in by the user. Display the result of dividing the first ...
Programming in C
Describe a method that can be used to gather a piece of data such as the users age.
Web Development and Design Foundations with HTML5 (8th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Write statements to do the following: i. Write a loop that computes the sum of all elements in the array, A ii. Write a loop that finds the minimum element in the array, A iii. Write a method to find the maximum in the array, Aarrow_forwardWrite a program to accomplish the following tasks:- a) Write a method to print the ArrayList in the reverse order b) Write a method to sort the ArrayList, and display the data after sorting c) Write a method to print the largest and the smallest element in the ArrayList d) In the main method ask user to enter 10 integers, store them in the ArrayList, pass the ArrayList to above methods, and then display the result after each call.arrow_forwardWrite method body of following methods: InsertNum(int num) // The function takes a number from user as input and it is intelligent enough to place the number at desired index of an array. For example if array has values from 1,3,5,7 and user entered 6 so the function will place 6 after 5 and before 7. (Use While Loop) InsertNum(int num,int position) // This function takes number and position from user and then place the number at desired position of array. Remember to ask from user if there is already a number at that position. (Code in C++)arrow_forward
- Using Javaarrow_forwardTASK 1 Write a Java method that returns the index of the smallest element in an array of integers. If the number of such elements is greater than 1, return the smallest index. Use the following header: public static int indexofLargestlestelement(double[] array) Write a test program that prompts the user to enter ten numbers, invokes this method to return the index of the smallest element, and displays the index.arrow_forward1. write a method that receives a character array and returns the number of symbols in the arrayarrow_forward
- Write method body of following methods: DeleteNum(int position) // This method will delete element from array at position entered by the user arrange the data after that position to left. (Using While loop) DeleteNum(int from, int to) // This method will delete elements from array at range given by the user, as the user inputs two positions i.e start and end, the program should than delete all numbers in that range. (Use C++ to code)arrow_forwardJava: the user enters array 3*4 print the max and min number, and their places in the array.arrow_forwardPlease solve it quickly and logical and correct solutionsarrow_forward
- Simple try-catch-finally Program This lab is a simple program that demonstrates how try-catch-finally works. You will notice the output when you enter incorrect input (for example, enter an incorrect index or an alpha character instead of an integer). Type up the code, execute and submit the results ONLY. 1. Enter a valid array index 2. Enter an invalid array index 3. Enter a letter instead of an integer - NOTE: Using the general error will show you the type of exception was caught, and you can then update your code to catch that type of error. 4. Try putting the "Exception e" before the IndexOutOfBounds Exception eob what happens and are you able to run the code - what happens? CODE: import java.util.Scanner; public class TryCatchFinally { public static void main(String[] args) { // Instantiate a scanner Scanner input = new Scanner(System.in); } } // Create an array with 4 values int an IntArr[] = {10, 15, 26, 99); try { System.out.println("Enter the index to see the number: "); int…arrow_forward2. The reserve method reserves an array by copying it to a new array. Rewrite the method that reverse the array passed in the argument and returns this array. Write a test program that prompts the user to enter ten numbers, invokes the method to reverse the numbers and displays the numbers.arrow_forward3 E Instructions Write a program named Averages that includes a method named Average that accepts any number of numeric parameters, displays them, and displays their average. For example, if 7 and 4 were passed to the method, the output would be: 74 Average is 5. Test your function in your Main (). Tests will be run against Average () to determine that it works correctly when passed one, two, or three numbers, or an array of numbers. Averages.cs 1 using static System.Console; 2 public class Averages 3 { 4 public static void Main() { +56N 8 O } + } // Write your main herearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
9.1: What is an Array? - Processing Tutorial; Author: The Coding Train;https://www.youtube.com/watch?v=NptnmWvkbTw;License: Standard Youtube License