├── Facade
    └── FacadeExample.java
├── README.md
└── Singleton
    ├── EntryPoint.java
    └── SingletonClassObjectExample.java


/Facade/FacadeExample.java:
--------------------------------------------------------------------------------
 1 | package Facade;
 2 | 
 3 | public class FacadeExample {
 4 |     public static void main(String[] args) {
 5 |         System.out.println("Facade Design Pattern");
 6 |         Computer computer = new Computer();
 7 |         computer.startBooting();
 8 |     }
 9 | }
10 | 
11 | class Computer {
12 |     //Providing an interface and covering a complex logic in the background.
13 |     private CPU cpu;
14 |     private Memory memory;
15 |     private HardDrive hardDrive;
16 | 
17 |     public Computer() {
18 |         this.cpu = new CPU();
19 |         this.memory = new Memory();
20 |         this.hardDrive = new HardDrive();
21 |     }
22 | 
23 |     public void startBooting(){
24 |         System.out.println("Computer booting starts...");
25 |         cpu.startProcessing();
26 |         memory.startLoadingMemory();
27 |         hardDrive.startReadingData();
28 |         System.out.println("Computer booting completed");
29 |     }
30 | 
31 | 
32 | }
33 | class CPU{
34 |     public void startProcessing(){
35 |         System.out.println("processing starts...");
36 |     }
37 | }
38 | class Memory{
39 |     public void startLoadingMemory(){
40 |         System.out.println("memory loading starts...");
41 |     }
42 | }
43 | class HardDrive{
44 |     public void startReadingData(){
45 |         System.out.println("reading data from hard drive starts...");
46 |     }
47 | }


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | ## Software Design Patterns
2 |   **Currently developed design patterns in this repository (with example):**
3 |   - Facade
4 |   - Singleton
5 | 


--------------------------------------------------------------------------------
/Singleton/EntryPoint.java:
--------------------------------------------------------------------------------
 1 | package Singleton;
 2 | 
 3 | public class EntryPoint {
 4 | 
 5 |     public static void main(String[] args) {
 6 | 
 7 |         SingletonClassObjectExample object = SingletonClassObjectExample.getInstance();
 8 |         //SingletonClassObjectExample object2 = new SingletonClassObjectExample(); // not available
 9 | 
10 |     }
11 | }
12 | 


--------------------------------------------------------------------------------
/Singleton/SingletonClassObjectExample.java:
--------------------------------------------------------------------------------
 1 | package Singleton;
 2 | 
 3 | class SingletonClassObjectExample{
 4 | 
 5 |     /*
 6 |     static instance
 7 |     private default constructor
 8 |     static Getter method
 9 |      */
10 |     static SingletonClassObjectExample obj = new SingletonClassObjectExample();
11 | 
12 |     private SingletonClassObjectExample(){
13 | 
14 | 
15 |     }
16 |     public static SingletonClassObjectExample getInstance(){
17 |         return obj;
18 |     }
19 | 
20 | }
21 | 


--------------------------------------------------------------------------------