Java 单例及多例

import java.util.ArrayList;
import java.util.List;

public class Car {

	//私有化构造函数，防止被外部的类new
	private Car() {
	}

	private static Car car = new Car();						//单例
	private static List<Car> cars = new ArrayList<Car>();	//多例，类似连接池
	
	public static Car getInstance() {
		return car;
	}

	public void run() {
		System.out.println("Car running...............");
	}
	
}

public class Test {
	
	@org.junit.Test
	public void test() {
		Car car = Car.getInstance();
		car.run();
		Car car2 = Car.getInstance();
		System.out.println(car == car2);
		System.out.println(car.equals(car2));
	}
}