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, 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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