简单工厂模式

package com.spsoft.factory;

public class FactoryDemo {
	public static void main(String[] args) {
		Car car = Factory.getCarInstance("Toyota");
		if (car != null) {
			car.start();
			car.stop();
		}
	}
}

class Factory {

	public static Car getCarInstance(String type) {
		Car car = null;
		try {
			car = (Car) Class.forName("com.spsoft.factory." + type)
					.newInstance();
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return car;
	}
}

interface Car {
	public void start();

	public void stop();
}

class Benz implements Car {

	public void start() {
		System.out.println("Benz start...");
	}

	public void stop() {
		System.out.println("Benz stop...");

	}

}

class Ford implements Car {
	public void start() {
		System.out.println("Ford start...");
	}

	public void stop() {
		System.out.println("Ford stop...");
	}
}

class Toyota implements Car {
	public void start() {
		System.out.println("Toyota start...");
	}

	public void stop() {
		System.out.println("Toyota stop...");
	}
}