public class Duckbill implements crawler,Mammalia   
{
	//實現crawl()方法
	public void crawl()
	{
		System.out.println("我可以爬行!");
	}
	//實現Mammal()方法
	public void Mammal()
	{
		System.out.println("我還是哺乳類動物!");
	}
	
	public static void main(String[] args)
	{
		duckbill duckbill = new duckbill();
		duckbill.crawl();
		duckbill.Mammal();
	}
}