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Chapter 9.4, Problem 9.21CP
Program Plan Intro

String class:

  • The “String” class provides a number of 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 specific 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 of this method can 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 several 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 the occurrences of one character with another character.
  • The “toString” method converts a “StringBuilder” object in to a regular 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. 9.11CP Ch. 9.3 - Prob. 9.12CP Ch. 9.3 - Prob. 9.13CP Ch. 9.3 - Look at the following code: String str1 = To be,... Ch. 9.3 - Prob. 9.15CP Ch. 9.3 - Assume that a program has the following... Ch. 9.4 - Prob. 9.17CP Ch. 9.4 - Prob. 9.18CP Ch. 9.4 - Prob. 9.19CP Ch. 9.4 - Prob. 9.20CP Ch. 9.4 - Prob. 9.21CP Ch. 9.4 - Prob. 9.22CP Ch. 9.4 - Prob. 9.23CP Ch. 9.4 - Prob. 9.24CP Ch. 9.5 - Prob. 9.25CP Ch. 9.5 - Prob. 9.26CP Ch. 9.5 - Look at the following string:... Ch. 9.5 - Prob. 9.28CP Ch. 9.6 - Write a statement that converts the following... Ch. 9.6 - Prob. 9.30CP Ch. 9.6 - Prob. 9.31CP Ch. 9 - The isDigit, isLetter, and isLetterOrDigit methods... Ch. 9 - Prob. 2MC Ch. 9 - The startsWith, endsWith, and regionMatches... Ch. 9 - The indexOf and lastIndexOf methods are members of... Ch. 9 - Prob. 5MC Ch. 9 - Prob. 6MC Ch. 9 - Prob. 7MC Ch. 9 - Prob. 8MC Ch. 9 - Prob. 9MC Ch. 9 - Prob. 10MC Ch. 9 - To delete a specific character in a StringBuilder... Ch. 9 - Prob. 12MC Ch. 9 - This String method breaks a string into tokens. a.... Ch. 9 - These static final variables are members of the... Ch. 9 - Prob. 15TF Ch. 9 - Prob. 16TF Ch. 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. 20TF Ch. 9 - Prob. 21TF Ch. 9 - Prob. 22TF Ch. 9 - Prob. 23TF Ch. 9 - int number = 99; String str; // Convert number to... Ch. 9 - Prob. 2FTE Ch. 9 - Prob. 3FTE Ch. 9 - Prob. 4FTE Ch. 9 - The following if statement determines whether... Ch. 9 - Write a loop that counts the number of space... Ch. 9 - Prob. 3AW Ch. 9 - Prob. 4AW Ch. 9 - Prob. 5AW Ch. 9 - Modify the method you wrote for Algorithm... Ch. 9 - Prob. 7AW Ch. 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. 1SA Ch. 9 - Prob. 2SA Ch. 9 - Prob. 3SA Ch. 9 - How can you determine the minimum and maximum... Ch. 9 - Prob. 1PC Ch. 9 - Prob. 2PC Ch. 9 - Prob. 3PC Ch. 9 - Prob. 4PC Ch. 9 - Prob. 5PC Ch. 9 - Prob. 6PC Ch. 9 - Check Writer Write a program that displays a... Ch. 9 - Prob. 8PC Ch. 9 - Prob. 9PC Ch. 9 - Word Counter Write a program that asks the user... Ch. 9 - Sales Analysis The file SalesData.txt, in this... Ch. 9 - Prob. 12PC Ch. 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. 16PC Ch. 9 - Lottery Statistics To play the PowerBall lottery,... Ch. 9 - Gas Prices In the student sample program files for...
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