设计模式1： Simple Factory

Product.java:

package gendwang.cisoco.com;

public interface Product 
{
	public String getType();
}

ConcreteProduct1.java:

package gendwang.cisoco.com;

public class ConcreteProduct1 implements Product
{
	public ConcreteProduct1()
	{
		
	}
	
	public String getType()
	{
		return "ConcreteProduct1";
	}
}

ConcreteProduct2.java:

package gendwang.cisoco.com;

public class ConcreteProduct2 implements Product
{
	public ConcreteProduct2()
	{
		
	}
	
	public String getType()
	{
		return "ConcreteProduct2";
	}
}

Factory.java:

package gendwang.cisoco.com;

public class Factory 
{
	public static Product getInstance(String type)
	{
		if(type.equals("ConcreteProduct1"))
		{
			return new ConcreteProduct1();
		}
		else if(type.equals("ConcreteProduct2"))
		{
			return new ConcreteProduct2();
		}
		else
		{
			return null;
		}
	}
}

Test.java:

package gendwang.cisoco.com;

public class Test 
{
	public static void main(String[] args)
	{
		Product product1 = Factory.getInstance("ConcreteProduct1");
		System.out.println("One product:" + product1.getType() + " is created");
		
		Product product2 = Factory.getInstance("ConcreteProduct2");
		System.out.println("One product:" + product2.getType() + " is created");
	}
}