TL;DR: You can support undo and redo actions by implementing the Command (p.233) and Memento (p.283) patterns (Design Patterns - Gamma et. al). The Memento Pattern This simple pattern allows you to save the states of an object.

Nov 3, 2016 · Implementing undo/redo is typically done by using one of the following approaches. Which one you should use depends on your desired undo/redo behavior. Undo/redo using the Command Pattern. Implementing this approach would look something like this: void do(); void undo(); public StudentSaveCommand(Student student) { ... [...]

Nov 7, 2011 · There is design pattern to do undo and redo. The command design pattern. It involes. void execute(); void undo(); void redo(); implement the above interface to perform your move, execute will encapsulate your action. public MoveCommand(){ // new board state is validated. public void execute(){ // change the board state.

Implementing undo and redo functionality in Java can enhance user experience in applications by allowing users to reverse and restore actions with ease. This can be accomplished using the Command Pattern which encapsulates actions in command objects.

Ideally, we'd like a user to be able to undo and redo any action in a queue: a user does something and can undo that action. After an undo, a user can redo said action. If a user performs an action after calling undo, the queue is branched and all possible previous redo are not available.

To implement undo and redo functionality, we can utilize two stacks: one for storing the actions that can be undone (undo stack) and another for storing the actions that can be redone (redo stack). Let's see how we can implement the undo and redo functionality using stacks.

Jul 29, 2024 · In this post, I’d like to show you a real-world undo/redo setup with stacks, database queries, APIs, and users. We will imitate some of Trello’s features. At the end of the post, you can find the repository that contains everything. Stack is crucial for implementing undo/redo.

Oct 26, 2024 · Built-in Stack Class: Java provides a java.util.Stack class that simplifies stack operations with methods like push(), pop(), and peek(). Real-World Applications: Stacks are used in web browsers, text editors, and game development for …

In this lesson, you will learn how to manage a document's editing history using Java's Stack data structure. You'll implement methods to efficiently apply, undo, and redo changes to a document while understanding the Last In, First Out (LIFO) principle of stacks.

Mar 17, 2025 · Undo and redo operation are the most widely used operation while dealing with file. In this section, we will discuss how to implement undo and redo operation in Java. Through the javax.swing.undo package, Swing offers the capabilities of Undo and Redo.