Text Editor E05 - How To Implement Text Editing Features for a Text Editor

A step-by-step walkthrough of adding text editing features to a Java-based command-line text editor. Covers inserting characters into lines using StringBuilder, handling edge cases like cursor position and out-of-bounds errors, implementing the Enter key to split lines, implementing Backspace/Delete to remove characters and merge lines, and adding Ctrl+S save functionality using Files.write. The file content is stored as a mutable ArrayList of strings, and each editing operation manipulates that list directly.