Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
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Textbook Question
Chapter 6.2, Problem 25STQ
Repeat the previous question, but accommodate a string that might contain leading or trailing blanks, such as “123”?.
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For each item, write a single regular expression that matches that item. Note that in ALL cases, the entire string must match without additional characters.
A string of digits that contains only digits and contains exactly two fives. Examples of acceptable strings include: "15445", "55", "05563"
The string should be rejected if it contains anything other than a digits.
2. A regular expression that matches a time expressed in the form "1:45 PM".
The hours part must be a number from 1 to 12, the minutes range from 00 to 59, and the time must indicate either AM or PM (uppercase only and preceded by exactly one space).
3. A regular expression that matches a string representing a comma separated list of variable names such as: hello, get_max, sum3
A variable name consists of letters, digits, and underscores but cannot start with a digit.
There is exactly one space after every comma. No other spaces are allowed.
Commas and spaces are not allowed before the first name…
A. Which statement about regular expressions is correct?
a. To find all occurrences of a matching substring for a regular expression, you must add thegflag.
b. By default, pattern matching using regular expressions locates all matches in the searched string.
c. To find all occurrences of a matching substring for a regular expression, you must add theiflag.
d. The default behavior of a regular expression is modified by adding flags to the beginning of the expression.
B. After the following JavaScript statements execute, the value ofcrayonsis["pink", "blue", "green"].
let crayons = ["pink", "purple"];crayons.shift();crayons.unshift("blue", "green");
Select one:
True
False
I have to add this solution to a conversion code.
This chapter is focused on strings and string manipulation, including slicing, searching, splitting, and case conversions.
Can you help me with this?
1. Ask the user for their name and their email address before you display the results of the conversions.
2. When the user enters the email address search the string for the @ symbol. If the symbol is not found, ask the user to re-enter their email address till they get it right.
3. When you display the conversion output to the user, you must include the user’s name in the output
Chapter 6 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Ch. 6.1 - If a class is named Student, what name can you use...Ch. 6.1 - When defining a constructor, what do you specify...Ch. 6.1 - What is a default constructor?Ch. 6.1 - Does every class in Java automatically have a...Ch. 6.1 - In the program PetDemo shown in Listing 6 2, you...Ch. 6.2 - Prob. 6STQCh. 6.2 - Can a class contain both instance variables and...Ch. 6.2 - Can you reference a static variable by name within...Ch. 6.2 - Can you reference an instance variable by name...Ch. 6.2 - Can you reference a static variable by name within...
Ch. 6.2 - Can you reference an instance variable by name...Ch. 6.2 - Is the following valid, given the class...Ch. 6.2 - Prob. 13STQCh. 6.2 - Prob. 14STQCh. 6.2 - Prob. 15STQCh. 6.2 - Is the following valid, given the class...Ch. 6.2 - What values are returned by each of the following?...Ch. 6.2 - Suppose that speed is a variable of type double...Ch. 6.2 - Repeat the previous question, but instead assign...Ch. 6.2 - Suppose that nl is of type int and n2 is of type...Ch. 6.2 - Define a class CircleCalculator that hat only two...Ch. 6.2 - Which of the following statements are legal?...Ch. 6.2 - Write a Java expression to convert the number in...Ch. 6.2 - Consider the variable 5 of type String that...Ch. 6.2 - Repeat the previous question, but accommodate a...Ch. 6.2 - Write Java code to display the largest and...Ch. 6.3 - Prob. 27STQCh. 6.3 - Consider the variable allCents in the method...Ch. 6.3 - What is wrong with a program that starts as...Ch. 6.3 - Prob. 30STQCh. 6.3 - In your definition of the class OutputFormat. In...Ch. 6.4 - Prob. 32STQCh. 6.4 - Prob. 33STQCh. 6.4 - Prob. 34STQCh. 6.4 - Consider the class Species in Listing 5.19 of...Ch. 6.4 - Repeat the previous question for a method...Ch. 6.4 - Still considering the class Species in Listing...Ch. 6.4 - Rewrite the method add in Listing 6.16 so that it...Ch. 6.4 - In Listing 6.16, the set method that has a String...Ch. 6.5 - Give the definitions of three accessor methods...Ch. 6.6 - If cardSuit is an instance of Suit and is assigned...Ch. 6.7 - Suppose you want to use classes in the package...Ch. 6.7 - Prob. 43STQCh. 6.7 - Can a package have any name you might want, or are...Ch. 6.7 - On your system, place the class Pet (Listing 6.1)...Ch. 6.8 - The previous section showed you how to change the...Ch. 6 - Prob. 1ECh. 6 - Prob. 2ECh. 6 - Write a default constructor and a second...Ch. 6 - Write a constructor for the class...Ch. 6 - Consider a class characteristic that will be used...Ch. 6 - Create a class RoomOccupancy that can be used to...Ch. 6 - Write a program that tests the class RoomOccupancy...Ch. 6 - Sometimes we would like a class that has just a...Ch. 6 - Create a program that tests the class Merlin...Ch. 6 - In the previous chapter, Self-Test Question 16...Ch. 6 - Create a class Android whose objects have unique...Ch. 6 - Prob. 12ECh. 6 - Modify the definition of the class Species in...Ch. 6 - Prob. 2PCh. 6 - Using the class Pet from Listing 6.1, write a...Ch. 6 - Do Practice Program 4 from Chapter 5 except define...Ch. 6 - The following class displays a disclaimer every...Ch. 6 - Do Practice Program 5 from Chapter 5 but add a...Ch. 6 - We can improve the Beer class from the previous...Ch. 6 - Define a utility class for displaying values of...Ch. 6 - Write a new class TruncatedDollarFormat that is...Ch. 6 - Complete and fully test the class Time that...Ch. 6 - Complete and fully test the class Characteristic...Ch. 6 - Write a Java enumeration LetterGrade that...Ch. 6 - Complete and fully test the class Per n that...Ch. 6 - Write a Temperature class that represents...Ch. 6 - Repeat Programming Project 8 of the previous...Ch. 6 - Write and fully test a class that represents...Ch. 6 - Write a program that will record the votes for one...Ch. 6 - Repeat Programming Project 10 from Chapter 5, but...Ch. 6 - Create a JavaFX application that displays a button...
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- This program is a simple example of manipulating stringcontent. On Line 8, we print out the first element of the stringstr1. On Line 9, we accessed the first element of the stringstr2 and assigned the character ‘K’ to it. When Line 10 is called, the content of str2 is now updated. Line 12 shows us string concatenation. What happened on Line 14?arrow_forwardDraw a DFA that accepts strings that do not contain two consecutive a's or two consecutive b's. Here, Σ = {a,b}. e.g. aba, bab, ababa, bababa, etc.arrow_forwardThere are numerous phrases that are palindromes when spacing is ignored. Examples include “go dog”, “flee to me remote elf” and “some men interpret nine memos”, among many others. Extend your solution to Exercise 75 so that it ignores spacing while determining whether or not a string is a palindrome. For an additional challenge, further extend your solution so that is also ignores punctuation marks and treats uppercase and lowercase letters as equivalent.arrow_forward
- I have to add the following solution to a code. The chapter is focused on strings and string manipulation including slicing, searching, splitting, and case conversions. Can you help me with this? 1. Input a date in numeric format from the user e.g. mm/dd/yy. 2. Examine the month entered by the user. If it is larger than 12 or smaller than 1 issue an error message and ask for input again. 3. Perform similar validation tests for the date and year. Year must be 2013. (Any other year is invalid) In addition, the year must only be two digits long. 4. Once all input has been validated, output the string in long date format. Thus a string that was input as 06/01/15 will be output as June 1, 2015.arrow_forwardWrite a regular expression for the set of strings over the alphabet {a, b} that have at least one a and at least one b. For example, aaaba and bbaba are strings in the set, but aaaa and bbb are not. Provide a brief explanation of how your expression works.arrow_forwardCity and State. Extract the city name and state from strings like “Utica, NY” and “Los Angeles, CA”. Assume the state is always the last two characters in the string, the city name has at least one character, there is a comma following the city name, and a single space after the comma. Use the split method to separate the city name from the state (Notice the city name will still have a comma at the end). The following attachement is a sample execution:arrow_forward
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