Java facade pattern example 2016-12-30 02:33

Facade pattern is very easy to understand. Let's say you have to call different subclasses to implement a feature. You can use a facade class to hide the detail of bottom layer. The sample code is like following.

Facade pattern

public class SubClass1 {
    public void method1(){
        System.out.println("this is method1 from subClass1");

public class SubClass2 {
    public void method2(){
        System.out.println("this is method2 from subClass2");

public class SubClass3 {
    public void method3(){
        System.out.println("this is method3 from subClass3");

public class Facade {
    public void mainMethod(){
        SubClass1 subClass1 = new SubClass1();
        SubClass2 subClass2 = new SubClass2();
        SubClass3 subClass3 = new SubClass3();

Client doesn't need to know the detail of bottom layer

public class Client {
    public static void main(String[] args) {
        Facade facade = new Facade();