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Write a program that allows a user to enter a line of text, counts number of words and number of vowels in the sentence, and gives the average number of vowels per word in the message (vowels are letters a, e, i, o, u or A, E, I, O , U). Your program should contain a class SentenceCounter and a graphical user interface called SentenceCounterGUI.
1. The class SentenceCounter can be used to count words, vowels and the average number of vowels per word in the sentence. It has the following methods:
The following UML diagram might be of assistance:
SentenceCounter
- sentence: String
- numberOfWords: int
- numberOfVowels: int
- average: double
+ SentenceCounter(sentence : String)
+ countWords ( ) : void
+ countVowels ( ) : void
+ averageVowels ( ) : void
+ getNumberOfWords( ) : int
+ getNumberOfVowels( ) : int
+ getAverage( ) : double
+ toString( ) : String
2. Write a graphical user interface class called SentenceCounterGUI. It should be able to manipulate the sentence of words and have the following behaviour:
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