什么是多态

简单的来说就是具有多种形态的能力的特征

package ten;public interface Day1 {public void ring();}package ten;public class Day2 extends Day3 implements Day4,Day1 {	@Override	public void openlock() {		// TODO Auto-generated method stub		System.out.println("...............");	}	@Override	public void getlock() {		// TODO Auto-generated method stub		System.out.println("...............");	}	@Override	public void open() {		// TODO Auto-generated method stub		System.out.println("...............");	}	@Override	public void close() {		// TODO Auto-generated method stub		System.out.println("...............");	}	@Override	public void ring() {		// TODO Auto-generated method stub		System.out.println("..........25646+.....");	}}package ten;public abstract class Day3 {	//开门public abstract void open ();//关门public abstract void close();}package ten;public interface  Day4 {	//开锁public void openlock();//上锁public void getlock();}package ten;public class luge {	public static void main(String[] args) {		// TODO Auto-generated method stub			Day2 d = new Day2();			d.getlock();			d.open();			d.openlock();			d.close();			d.ring();	}}