How to Implement AbstractFactory Design Pattern in Java

Here this example demonstrates how to implement AbstractFactory Pattern in Java.

Source Code

package com.beginner.examples;


//product 1  
abstract class Product1 {  
    public abstract void product1();  
}  
  
//product 2  
abstract class Product2 {  
    public abstract void product2();  
}  
  
//detail product
class MilkTea extends Product1 {  
    @Override 
    public void product1() { 
    	System.out.println("a milk tea"); 
    }  
}  
  
class Juice extends Product1 {  
    @Override 
    public void product1() { 
    	System.out.println("a juice"); 
    }  
}  
  
class Bread extends Product2 {  
    @Override 
    public void product2() { 
    	System.out.println("a bread"); 
    }  
}  
  
class Sausage extends Product2 {  
    @Override 
    public void product2() { 
    	System.out.println("a sausage"); 
    }  
}  
  
//abstract factory 
abstract class Factory {  
    abstract Product1 createProduct1();  
    abstract Product2 createProduct2();  
}  
  
//detail factory
class Factory1 extends Factory {  
    @Override 
    public Product1 createProduct1() { 
    	return new MilkTea(); 
    }  
    @Override 
    public Product2 createProduct2() { 
    	return new Bread(); 
    }  
}  
  
class Factory2 extends Factory {  
    @Override 
    public Product1 createProduct1() { 
    	return new Juice();
    }
    @Override 
    public Product2 createProduct2() { 
    	return new Sausage();
    }  
}  
  
public class AbstractFactoryExample {  
    public static void main(String[] args) {
    	Factory factory1 = new Factory1();  
    	Factory factory2 = new Factory2(); 
    	factory1.createProduct1().product1();
    	factory2.createProduct1().product1();
    	factory1.createProduct2().product2();
    	factory2.createProduct2().product2();         
    }
}

Output:

a milk tea
a juice
a bread
a sausage