Junior — Middle
Tell us about your experience using the command pattern in projects
sobes.tech AI
Answer from AI
The "Command" pattern allows encapsulating a request or operation as an object, which simplifies managing actions, their order, undo, and redo.
In my projects, I used this pattern to implement Undo/Redo systems and for deferred task execution. For example, each user operation (create, modify, delete) was represented as a separate command object with execute() and undo() methods.
Example:
public interface Command {
void execute();
void undo();
}
public class AddTextCommand implements Command {
private Document doc;
private String text;
public AddTextCommand(Document doc, String text) {
this.doc = doc;
this.text = text;
}
public void execute() {
doc.addText(text);
}
public void undo() {
doc.removeText(text);
}
}
This approach improves code extensibility and maintainability by separating operation logic from their invocation.