Assume inputFile is a Scanner object used to read data from a text file that contains a number of lines.Some lines contain an alphabetic string, while others contain a single integer value.Select an expression to complete the following code segment, which counts the number of integer values in the input file.
A)inputFile.hasNext()
B)inputFile.hasNextInt()
C)Character.isDigit(inputFile.next())
D)inputFile.nextInt()

Question

Assume inputFile is a Scanner object used to read data from a text file that contains a number of lines.Some lines contain an alphabetic string, while others contain a single integer value.Select an expression to complete the following code segment, which counts the number of integer values in the input file.  
A)inputFile.hasNext() 
B)inputFile.hasNextInt() 
C)Character.isDigit(inputFile.next()) 
D)inputFile.nextInt()

Quizplus · Accepted Answer

The method hasNextInt() checks if the next token in the input stream can be interpreted as an int value. If this is true, it returns true, indicating that there is another integer value in the input file. Therefore, using this method is the most appropriate way to count the number of integer values in the input file. Option A (inputFile.hasNext()) would only tell us if there is another token in the input stream, but not if it is an integer value. Option C (Character.isDigit(inputFile.next())) checks if the first character in the next token is a digit, but this would not work if the token included non-digit characters. Option D (inputFile.nextInt()) would read and consume the next integer value in the input stream, but it is not what the question is asking for.

Assume InputFile Is a Scanner Object Used to Read Data