String class: The “String” class would provide different methods that examines for a string inside of a string. The term “substring” refers to a string that denotes another string’s part. The “startsWith” method would determine whether calling string of object begins with a particular substring. The method returns “true” if string begins with specified substring, it returns “false” otherwise. The “endsWith” method would determine whether calling string would end with a specified substring. The method returns “true” if string ends with specified substring, it returns “false” otherwise. The “regionMatches” method would determine whether specified regions for two strings match. The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed. StringBuilder class: The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed. It provides numerous methods that “String” class does not have. The “append” method accepts an argument that might be a primitive data type. It appends a string representation to contents of calling object. The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted. The “replace” method replaces occurrences of single character with another character. The “deleteCharAt” method removes character at specified position in sequence The “toString” method converts a “StringBuilder” object in to a regular string.

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Answer 1

Question

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

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Answer 2

Question

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

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Answer 3

Question

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

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Answer 4

Question

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

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Answer 5

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

Answer 6

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

Answer 7

Chapter 9.4, Problem 9.23CP

Program Plan Intro

String class:

The “String” class would provide different methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a particular substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument for this method could be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides numerous methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces occurrences of single character with another character.

The “deleteCharAt” method removes character at specified position in sequence

The “toString” method converts a “StringBuilder” object in to a regular string.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 9.2 - Prob. 9.1CP Ch. 9.2 - Write an if statement that displays the word digit...Ch. 9.2 - Prob. 9.3CP Ch. 9.2 - Write a loop that asks the user, Do you want to...Ch. 9.2 - Prob. 9.5CP Ch. 9.2 - Write a loop that counts the number of uppercase...Ch. 9.3 - Prob. 9.7CP Ch. 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

Solution Summary: The author explains that the "String" class provides various methods that examines for a string inside of the string. The "setCharAt" method sets character at specified position in sequence.

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