🏭 Pattern Factory

Author: sdmg15

README.md

@@ -65,3 +65,25 @@ Classes are in the package `com.Singleton`;
       }
     ```
 # Pattern Factory
+
+  Factory Pattern is one of the Creational Design pattern and it's widely used in  JDK as well as frameworks like
+Spring and Struts.
+This pattern is used when we have a super class with multiple sub-classes and based on the input, we need to return one of the sub-class.
+
+  ```java
+    import com.factory.FactoryClass ; //The factory class
+    import com.factory.PC; //sub-class
+    import com.factory.Server; //sub-class
+    //PC and Server classes extend from Computer.
+
+    public static void main(String[] args){
+
+      FactoryClass fc = new FactoryClass();
+      Computer comp1 = fc.getComputer("PC",16,499,4.3);
+      System.out.println(comp1);
+
+
+      Computer comp2 = fc.getComputer("Server",30,900,9);
+      System.out.println(comp2);
+
+    }

com/factory/Computer.java

@@ -0,0 +1,19 @@
+package com.factory;
+
+/**
+ * Created by sdmg15 on 18/03/17.
+ */
+public abstract class Computer {
+
+
+    public abstract String getRam();
+    public abstract String getCpu();
+    public abstract String getHdd();
+
+    @Override
+
+    public String toString(){
+        return "Config :: RAM = " + this.getRam() + " CPU = " + this.getCpu() + " HDD = " + this.getHdd();
+    }
+
+}

com/factory/FactoryClass.java

@@ -0,0 +1,14 @@
+package com.factory;
+
+/**
+ * Created by sdmg15 on 18/03/17.
+ */
+public class FactoryClass {
+
+    public static Computer getComputer(String c, String ram, String hdd, String dd){
+        if("PC".equalsIgnoreCase(c)) return  new PC(ram,hdd,dd);
+        else if("Server".equalsIgnoreCase(c)) return new Server(ram,hdd,dd);
+
+        return null;
+    }
+}

com/factory/PC.java

@@ -0,0 +1,32 @@
+package com.factory;
+
+/**
+ * Created by sdmg15 on 18/03/17.
+ */
+public class PC extends Computer {
+
+    private int  ram;
+    private double cpu;
+    private int  hdd;
+
+
+    public PC(int ram,int hdd, double cpu){
+        this.ram = ram;
+        this.hdd= hdd;
+        this.cpu = cpu;
+    }
+    public String getRam(){
+        return  this.ram;
+    }
+    public String getCpu(){
+        return this.cpu;
+    }
+
+    public String getHdd(){
+        return  this.hdd;
+    }
+
+
+
+
+}

com/factory/Server.java

@@ -0,0 +1,27 @@
+package com.factory;
+
+/**
+ * Created by sdmg15 on 18/03/17.
+ */
+public class Server extends Computer{
+    private int  ram;
+    private double cpu;
+    private int  hdd;
+
+
+    public Server(int ram,int hdd,double cpu){
+        this.ram = ram;
+        this.hdd= hdd;
+        this.cpu = cpu;
+    }
+    public String getRam(){
+        return  this.ram;
+    }
+    public String getCpu(){
+        return this.cpu;
+    }
+
+    public String getHdd(){
+        return  this.hdd;
+    }
+}