machine.java

Java 程序设计源码 只提供了部分

interface Machine
{
	void run();
}

class Person
{
	void run()
	{
		System.out.println("run");
	}
}

class Robot extends Person
{
        private class MachineHeart implements Machine
        {
                public void run()
                {
                        System.out.println("Heart run");
                }
        }
        
        Machine getMachine()
        {
                return new MachineHeart();
        }
}

class main
{
        public static void main(String[] args)
        {
                Robot r = new Robot();
                Machine m = r.getMachine();
                m.run();
                r.run();
        }
}