Chapter 13, Problem 9PE

Program Plan Intro

Finding position of a string in a phrase

Program plan:

Filename: “Sentence.java”

This program file is used to define a class “Sentence”. In the code,

• Define a class “Sentence”.
  • Declare class members “phrase”.
  • Define a constructor “Sentence()”.
    • Initialize the “phrase”.
  • Define a method “find()”.
    • Call the method “find()” and return the value.
  • Define a method “find()”.
    • If the length of “phrase” is greater than the length of “text”.
      • Return “-1”.
        • If the condition “phrase.startsWith(text)” is true,
        • • Return “index”.
        • Create the object of class “Sentence”.
        • Call the method “find()” and return the value.

Filename: “SentenceDemo.java”

This program file is used to define a class “SentenceDemo”. In the code,

• Define a class “SentenceDemo”.
  • Define a method “main()”.
    • Create the object “s” of class “Sentence”.
    • Call the method “find()” and assign to “n”.
    • Print the value of “n”.
    • Print the expected result.
    • Call the method “find()” and assign to “n”.
    • Print the value of “n”.
    • Print the expected result.