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. The “replace” method substitutes occurrences of one character with another character. 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 substitutes 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. The “replace” method replaces a specified substring with a string.

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Chapter 9.4, Problem 9.24CP

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.

The “replace” method substitutes occurrences of one character with another character.

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 substitutes 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.

The “replace” method replaces a specified substring with a string.

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