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

"java.util.NoSuchElementException: No line found" Problem Resolution

When reading a file using a Scanner in Java, the "java.util.NoSuchElementException: No line found" error occurs when the end of the file is reached and there are no more lines to read. This can be addressed by checking for the existence of the next line before attempting to read it.

In the example code provided:

while ((str = sc.nextLine()) != null) {
    // code block
}

The error occurs because the loop does not verify if the next line exists before attempting to read it. To resolve this, use the hasNextLine() method:

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

By using hasNextLine(), the loop will continue to read lines until there are no more lines to read in the file. It avoids the exception and allows the program to handle the end of the file gracefully.

Additional Notes:

• Readers typically return null when reaching the end of a file.
• The code assumes proper input file formatting. If the input file is not formatted correctly, the NoSuchElementException may still occur.

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