To use temporary file to reverse all lines in a file Program plan: Import necessary packages. Create a class “LinesReverserTest”, Define the “main()” method. Execute “try” statement, Create a “Scanner” object. Prompt the user to enter the name of file. Get the name of file from the user. Call the method “reverseLines()”. Catch if exception occurs, Print the exception. Define the method “reverseLines()”, Create the input file stream to get the bytes from an input file. Get the input bytes form the file. Call the method “readAllLines()” to read all the lines from the input file. Create a temporary file stream. Create a temporary file. Get the file name. Create an input file stream. Create a loop, Create an inner loop, Call the method “write()” to write the content into temporary file. Call the method “write()” to write new line in the temporary file. Close the temporary file stream. Get the path of original file. Get the path of temporary file. Delete the original file. Get the original file. Call the method “move()” to move the temporary file into its original file.

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Chapter 21, Problem 5PE

Program Plan Intro

To use temporary file to reverse all lines in a file

Program plan:

Import necessary packages.

Create a class “LinesReverserTest”,

Define the “main()” method.

Execute “try” statement,

Create a “Scanner” object.

Prompt the user to enter the name of file.

Get the name of file from the user.

Call the method “reverseLines()”.

Catch if exception occurs,

Print the exception.

Define the method “reverseLines()”,

Create the input file stream to get the bytes from an input file.

Get the input bytes form the file.

Call the method “readAllLines()” to read all the lines from the input file.

Create a temporary file stream.

Create a temporary file.

Get the file name.

Create an input file stream.

Create a loop,

Create an inner loop,

Call the method “write()” to write the content into temporary file.

Call the method “write()” to write new line in the temporary file.

Close the temporary file stream.

Get the path of original file.

Get the path of temporary file.

Delete the original file.

Get the original file.

Call the method “move()” to move the temporary file into its original file.

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