Command pattern Java

1. What is command pattern in Java?
2. What is command pattern example?
3. When to use command design pattern in Java?
4. What is a command pattern in programming?

What is command pattern in Java?

A Command pattern is an object behavioral pattern that allows us to achieve complete decoupling between the sender and the receiver. (A sender is an object that invokes an operation, and a receiver is an object that receives the request to execute a certain operation.

What is command pattern example?

The Command pattern allows requests to be encapsulated as objects, thereby allowing clients to be parametrized with different requests. The "check" at a diner is an example of a Command pattern. The waiter or waitress takes an order or command from a customer and encapsulates that order by writing it on the check.

When to use command design pattern in Java?

The command pattern should be used when: You need a command to have a life span independent of the original request, or if you want to queue, specify and execute requests at different times. You need undo/redo operations. The command's execution can be stored for reversing its effects.

What is a command pattern in programming?

In object-oriented programming, the command pattern is a behavioral design pattern in which an object is used to encapsulate all information needed to perform an action or trigger an event at a later time. This information includes the method name, the object that owns the method and values for the method parameters.