How to Prevent 'java.util.NoSuchElementException: No line found' When Using Scanner in Java?

Fixing "java.util.NoSuchElementException: No line found" Error When Reading from Files using Scanner

The "java.util.NoSuchElementException: No line found" error occurs when using Scanner to read from a file and encountering an end of file (EOF). The error message indicates that no more lines are available to be read.

To prevent this error, it's necessary to check if the Scanner has more lines to read before attempting to call nextLine(). The Scanner class provides a hasNextLine() method to check for the availability of another line.

Here's a modified version of the provided code that includes a check for hasNextLine():

while (sc.hasNextLine()) {
    str = sc.nextLine();
    // ... Other code here
}

By using hasNextLine(), you ensure that the nextLine() method is only called if there's actually another line to read. This prevents the NoSuchElementException from occurring at the end of the file.

Note that it's also prudent to use a loop variable to track the number of lines processed, as shown in the original code, to handle the different scenarios (e.g., "Locations," "Professions," and "Individuals"). However, it's important to reset the loop variable to 0 after processing each set of lines.

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