Chapter 7, Problem 3PE

Program Plan Intro

Trim the blank lines

Program plan:

Filename: “Test.java”

• Include the required header files.
• Define the “Test” class
• Define the main method.
  • Call the “trimBlankLines” 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: “FileTrimmer.java”

• Include the required header files.
• Define the “FileTrimmer” class
  • Define the “trimBlankLines” method
    • Create an object for “ArrayList” class
    • Declare the variable
      • Get the filename in try block
        • Check the file contains integer values.
        • • Move to the next line.
          • Check the “line” is empty or no blank line
            • Set the value
            • Add the values
      • In “catch” block, throw a “FileNotFoundException”.
      • Create an object for “ListIterator” class
      • Trim the line by removing the spaces in the file.
      • Get the file name from the try block using “PrintWriter” class
        • Write the values back the same file
      • In “catch” block, throw a “FileNotFoundException”.