Big Java Late Objects
Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
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Chapter 7, Problem 2PE
Program Plan Intro

Remove the blank lines

Program plan:

Filename: “Test.java”

  • Include the required header files.
  • Define the “Test” class
  • Define the main method.
    • Call the “removeLines” method.
    • Declare the integer variable.
    • In “try” block, declare an object for “Scanner” class and pass the file name.
      • Check the file contains integer values.
        • Move to the next line.
        • Increment the “count” value.
    • In “catch” block, throw a “FileNotFoundException”.
    • Display the output.

Filename: “BlankLinesRemover.java”

  • Include the required header files.
  • Define the “BlankLinesRemover” class
    • Define the “removeLines” method
      • Create an object for “ArrayList” class
        • Get the filename in try block
          • Check the file contains integer values.
            • Move to the next line.
            • Check the “line” is empty or not
              • Add the values
        • In “catch” block, throw a “FileNotFoundException”.
        • Get the file name from the try block using “PrintWriter” class
          • Write the values back the same file
        • In “catch” block, throw a “FileNotFoundException”.

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