Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
7th Edition
ISBN: 9780134802213
Author: Tony Gaddis
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 9, Problem 1MC
The isDigit, isLetter, and isLetterOrDigit methods are members of this class.
- a. String
- b. Char
- c. Character
- d. StringBuilder
Expert Solution & Answer
Program Description Answer
Methods of the class:
The methods “isDigit”, “isLetter”and “isLetterOrDigit” are some of the members of the class “Character”.
Hence, the correct answer is option “C”.
Explanation of Solution
Character class:
- A wrapper class that is used for the char data type is called as “Character” class.
- It contains various method for testing and converting the data that is of character type.
- The character is a part of “java.lang” package and it does not needed to be imported for using the class.
- It contains various static methods for testing the value of the character variables.
Reason for the incorrect answers:
String:
The class is used to represent character of strings.
Hence, the option “A” is wrong.
Char:
“char” is considered as the data type but not the class.
Hence, the option “B” is wrong.
StringBuilder:
The class is used to create a changeable strings and it is similar to String objects.
Hence, the option “D” is wrong.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
In the class String, the substring method inserts a String into another String.
-True
or
-False
Java coding
Strings as arguments
public String firstAndLast(String str)
{
//declare and create your first char
//declare and create your second char
//return your first and last char as a String
}
Chapter 9 Solutions
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Ch. 9.2 - Prob. 9.1CPCh. 9.2 - Write an if statement that displays the word digit...Ch. 9.2 - Prob. 9.3CPCh. 9.2 - Write a loop that asks the user, Do you want to...Ch. 9.2 - Prob. 9.5CPCh. 9.2 - Write a loop that counts the number of uppercase...Ch. 9.3 - Prob. 9.7CPCh. 9.3 - Modify the method you wrote for Checkpoint 9.7 so...Ch. 9.3 - Look at the following declaration: String cafeName...Ch. 9.3 - Prob. 9.10CP
Ch. 9.3 - Prob. 9.11CPCh. 9.3 - Prob. 9.12CPCh. 9.3 - Prob. 9.13CPCh. 9.3 - Look at the following code: String str1 = To be,...Ch. 9.3 - Prob. 9.15CPCh. 9.3 - Assume that a program has the following...Ch. 9.4 - Prob. 9.17CPCh. 9.4 - Prob. 9.18CPCh. 9.4 - Prob. 9.19CPCh. 9.4 - Prob. 9.20CPCh. 9.4 - Prob. 9.21CPCh. 9.4 - Prob. 9.22CPCh. 9.4 - Prob. 9.23CPCh. 9.4 - Prob. 9.24CPCh. 9.5 - Prob. 9.25CPCh. 9.5 - Prob. 9.26CPCh. 9.5 - Look at the following string:...Ch. 9.5 - Prob. 9.28CPCh. 9.6 - Write a statement that converts the following...Ch. 9.6 - Prob. 9.30CPCh. 9.6 - Prob. 9.31CPCh. 9 - The isDigit, isLetter, and isLetterOrDigit methods...Ch. 9 - Prob. 2MCCh. 9 - The startsWith, endsWith, and regionMatches...Ch. 9 - The indexOf and lastIndexOf methods are members of...Ch. 9 - Prob. 5MCCh. 9 - Prob. 6MCCh. 9 - Prob. 7MCCh. 9 - Prob. 8MCCh. 9 - Prob. 9MCCh. 9 - Prob. 10MCCh. 9 - To delete a specific character in a StringBuilder...Ch. 9 - Prob. 12MCCh. 9 - This String method breaks a string into tokens. a....Ch. 9 - These static final variables are members of the...Ch. 9 - Prob. 15TFCh. 9 - Prob. 16TFCh. 9 - True or False: If toLowerCase methods argument is...Ch. 9 - True or False: The startsWith and endsWith methods...Ch. 9 - True or False: There are two versions of the...Ch. 9 - Prob. 20TFCh. 9 - Prob. 21TFCh. 9 - Prob. 22TFCh. 9 - Prob. 23TFCh. 9 - int number = 99; String str; // Convert number to...Ch. 9 - Prob. 2FTECh. 9 - Prob. 3FTECh. 9 - Prob. 4FTECh. 9 - The following if statement determines whether...Ch. 9 - Write a loop that counts the number of space...Ch. 9 - Prob. 3AWCh. 9 - Prob. 4AWCh. 9 - Prob. 5AWCh. 9 - Modify the method you wrote for Algorithm...Ch. 9 - Prob. 7AWCh. 9 - Look at the following string:...Ch. 9 - Assume that d is a double variable. Write an if...Ch. 9 - Write code that displays the contents of the int...Ch. 9 - Prob. 1SACh. 9 - Prob. 2SACh. 9 - Prob. 3SACh. 9 - How can you determine the minimum and maximum...Ch. 9 - Prob. 1PCCh. 9 - Prob. 2PCCh. 9 - Prob. 3PCCh. 9 - Prob. 4PCCh. 9 - Prob. 5PCCh. 9 - Prob. 6PCCh. 9 - Check Writer Write a program that displays a...Ch. 9 - Prob. 8PCCh. 9 - Prob. 9PCCh. 9 - Word Counter Write a program that asks the user...Ch. 9 - Sales Analysis The file SalesData.txt, in this...Ch. 9 - Prob. 12PCCh. 9 - Alphabetic Telephone Number Translator Many...Ch. 9 - Word Separator Write a program that accepts as...Ch. 9 - Pig Latin Write a program that reads a sentence as...Ch. 9 - Prob. 16PCCh. 9 - Lottery Statistics To play the PowerBall lottery,...Ch. 9 - Gas Prices In the student sample program files for...
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
- True or False: The String class’s replace method can replace individual characters, but cannot replace substrings.arrow_forward7bact1 Please help me answer this in python programming.arrow_forwardList the methods you'd need to figure out each of the following facts about a string object's value: includes the word "VIDI" as a substringarrow_forward
- Please help me this I need answer typing clear urjent no chatgpt used i will give 5 upvotesarrow_forwardThe String class is a mutable class. O True O Falsearrow_forwardJAVAA7-Write a class with a constructor that accepts a String object as its argument. The class should have a method that returns the number of vowels in the string, and another method that returns the number of consonants in the string. Demonstrate the class in a program by invoking the methods that return the number of vowels and consonants. Print the counts returned.arrow_forward
- JAVA PPROGRAM ASAP Please create this program ASAP BECAUSE IT IS MY LAB ASSIGNMENT so it passes all the test cases. The program must pass the test case when uploaded to Hypergrade. Chapter 9. PC #2. Word Counter (page 608) Write a method that accepts a String object as an argument and returns the number of words it contains. For instance, if the argument is “Four score and seven years ago” the method should return the number 6. Demonstrate the method in a program that asks the user to input a string and then passes it to the method. The number of words in the string should be displayed on the screen. Test Case 1 Please enter a string or type QUIT to exit:\nHello World!ENTERThere are 2 words in that string.\nPlease enter a string or type QUIT to exit:\nI have a dream.ENTERThere are 4 words in that string.\nPlease enter a string or type QUIT to exit:\nJava is great.ENTERThere are 3 words in that string.\nPlease enter a string or type QUIT to exit:\nquitENTERarrow_forwardQ2-Write a java program that has a method called stringDay to display the string named Day based on the number of day entered by the user. The method should take one argument and return a String(name of the (dayarrow_forward. COMPLETE THE CODES.arrow_forward
- Computer Science Programming question C++ Codearrow_forwardJAVA CODE PLEASE Using conditional and looping structures, make a simple calculator that does the following: First, the program should get a single string ? from the user, so that it knows what type of operation it is supposed to perform. If ? is "negate", obtain one number from the user, then negate the number. Output the negated number. If ? is "add", obtain two numbers from the user, then add the two numbers. Output the sum. similar goes to "subtract" & "multiply" division is excluded If ? is "max", obtain two numbers from the user, then get the larger value between the two numbers. If the numbers are equal, output any of them. Input: The first line of input contains a single integer ? (1≤?≤10), which is the number of operations you have to perform. This is followed by a single line containing ? operations separated by a single space. The start of each operation contains a string (which can be negate, add, subtract, multiply or max). If the string is negate, this will be…arrow_forwardJava code please Using conditional and looping structures, make a simple calculator that does the following: First, the program should get a single string ? from the user, so that it knows what type of operation it is supposed to perform. If ? is "negate", obtain one number from the user, then negate the number. Output the negated number. If ? is "add", obtain two numbers from the user, then add the two numbers. Output the sum. similar goes to "subtract" & "multiply" division is excluded If ? is "max", obtain two numbers from the user, then get the larger value between the two numbers. If the numbers are equal, output any of them. Input: The first line of input contains a single integer ? (1≤?≤10), which is the number of operations you have to perform. This is followed by a single line containing ? operations separated by a single space. The start of each operation contains a string (which can be negate, add, subtract, multiply or max). If the string is negate, this will be…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Expressions in C++ | C++ tutorial for beginners; Author: Tutorial Mart;https://www.youtube.com/watch?v=XHbsZGpmRc8;License: Standard YouTube License, CC-BY
expression in python # python expressions; Author: Abhishek Tripathi;https://www.youtube.com/watch?v=Cc-kJGRjH6k;License: Standard Youtube License