Realworld example

Real-world example

In plain words

Wikipedia says

And then it can be used as:

var orcMessage=newMessenger().messageFromOrcs();

orcMessage.print();// Where there is a whip there is a way.

var elfMessage=newMessenger().messageFromElves();

elfMessage.print();// Much wind pours from your mouth.

var messenger=newMessenger();

LOGGER.info("Message from the orcs:");

messenger.messageFromOrcs().print();

LOGGER.info("Message from the elves:");

messenger.messageFromElves().print();

The console output:

* You want clients to be able to ignore the difference between compositions of objects and

individual objects. Clients will treat all objects in the composite structure uniformly.

*[java.awt.Container](http://docs.oracle.com/javase/8/docs/api/java/awt/Container.html) and[java.awt.Component](http://docs.oracle.com/javase/8/docs/api/java/awt/Component.html)

*[Apache Wicket](https://github.com/apache/wicket) component tree, see[Component](https://github.com/apache/wicket/blob/91e154702ab1ff3481ef6cbb04c6044814b7e130/wicket-core/src/main/java/org/apache/wicket/Component.java) and[MarkupContainer](https://github.com/apache/wicket/blob/b60ec64d0b50a611a9549809c9ab216f0ffa3ae3/wicket-core/src/main/java/org/apache/wicket/MarkupContainer.java)

publicstaticvoidmain(String[]args) {

LOGGER.info("Message from the orcs: ");

varorcMessage =newMessenger().messageFromOrcs();

orcMessage.print();

varmessenger =newMessenger();

LOGGER.info("\nMessage from the elves: ");

LOGGER.info("Message from the orcs: ");

messenger.messageFromOrcs().print();

varelfMessage =newMessenger().messageFromElves();

elfMessage.print();

LOGGER.info("Message from the elves: ");

messenger.messageFromElves().print();

}

}

protectedvoidprintThisAfter() {

System.out.print(".");

System.out.print(".\n");

}

}