Chapter 10, Problem 15PP

Program Plan Intro

Edit the file content

Program Plan:

Filename: “SimpleEditor.java”

• Import the required packages.
• Declare the class “SimpleEditor”.
  • Declare the required constant variables.
  • Declare the required variables for button, text field, text area, and label.
  • Create an object for the “JPanel”.
  • Define the main method.
    • Create an object for the class.
    • Show the GUI window.
  • Define the constructor.
    • Set the window size
    • Close the window.
    • Create an object for “Container” class.
    • Set the border layout.
    • Add the labels, text field, and button into the window.
    • Add the action to the button.
    • Add the border layout.
    • Add the action to the button.
    • Add the border layout.
  • Declare the “actionPerformed” method.
    • Get the source.
    • If the “source” is equal to “fileButton”, call the “getFile” method.
    • If the “source” is equal to “saveButton”, call the “saveFile” method.
    • Otherwise, set the text as “Unexpected error”.
  • Define “getFile” method.
    • Declare the required variable.
    • Get the text.
    • Create an object for the “File” class.
    • Set the empty text.
    • If the “fileObject” is not exists, set the text as “New file: Start editing it.”
    • If the “fileObject” is not readable, set the text, as “That file is not readable.”
    • Otherwise, in “try” block get the content line by line from the file and finally close that file.
    • In “catch” block, set the text as “Problem reading from file.”
  • Define “saveFile” method.
    • Declare the required variables.
    • Create an object for “File” class.
    • In “try” catch,
      • Get the file from the folder.
      • Set the text as “File was written”.
      • Close the file.
        • In “catch” block, set the text as “Problem reading from file.”