Java-马士兵设计模式学习笔记-工厂模式-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));
}
}