Design Patterns and Best Practices in Java

Examples

Coffee machines are like façades for the coffee grinders and coffee brewers, because they hide their functionalities. The following code simulates a coffee machine that grinds coffee beans, brews the coffee, and places it in a coffee cup.

The issue, as you will find out from the following code, is that we cannot get fine-sized ground coffee (we have to grind the beans a little longer), since the serveCoffee() method knows only how to make coarse-sized ground coffee. This could be fine for some coffee drinkers but not for all:

package gof.structural.facade;publicclass Main{  publicstaticvoid main (String[] args) throws java.lang.Exception  {    CoffeeMachineFacade facade = new SuperstarCoffeeMachine();    facade.serveCoffee();  }}class GroundCoffee ...