Chapter 41 More with Files
41.1 Exercises of a General Nature with Files
Exercise 41.1-1 Calculating the Sum of 10 Numbers
Suppose there is a file named “f_data41.1-1.txt” that contains 10 3-digit integers (separated by a single space character). An example of the structure of the file is shown here.
Write a Java program that calculates and displays their sum.
Solution
There are two approaches to iterate through the numbers of this file.
First approach
In this approach, a string variable named values gets the content of the whole line of the file. Then, the substring() method is used in a for-loop to split the content into individual three-digit numbers. These numbers are then converted to integers using ...
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