Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
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Chapter 9, Problem 12PC
Program Plan Intro

Miscellaneous String Operations

Program Plan:

The detail of “StringOperationsDemo” class is shown below:

  • In the “main()” method,
    • Declare and initialize the variable and array variable.
    • Call the wordCount() method to display the number of words in string.
    • Call the mostFrequent() method to display the most frequently occurring character.
    • Call replaceSubString() method to replace “the” with “that”.
    • Call arrayToString() method to convert an array to a string.
    • Display the converted string.

The detail of “StringOperations” class is shown below:

  • In the “wordCount()” method,
    • Separate the string using a space delimiter.
    • Return the number of words in string.
  • In the “arrayToString()” method,
    • Convert the array value to string.
    • Return the converted string.
  • In the “mostFrequent()” method,
    • Declare the variable.
    • Convert the String to an array and store into “cArray” variable.
    • Create an integer array variable to store the frequencies of the characters in “cArray” variable.
    • The for loop executes until the frequencies length. If yes,
      • Initialize frequencies elements to “0”.
    • The for loop executes until the array length. If yes, loop executes until the array length. If yes,
      • Check frequency of element and then calculate it.
    • The for loop executes until the frequencies length. If yes,
      • Check the frequencies of elements and determine the most frequent character.
    • Return the most frequent character.
  • In the “replaceSubString()” method,
    • Check the “string2” and “string3” are the same. If yes,
      • Return the string.
    • Create an object for “string1”.
    • Determine the first occurrence of “string2”.
    • The while loop executes until the "index" is not equal to “-1”. If yes,
      • Call the replace() method to replace this occurrence of the substring.
      • Find the next occurrence of “string2”.
    • Return the string.

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Chapter 9 Solutions

Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)

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...
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