JAVA多态+接口实现

public interface Pci{

public void start();
public void pause();
public void stop();

 

 

}

 

----------------

public class SoundCard implements Pci{

@Override
public void  start()
{
System.out.println("声卡启动");
}

@Override
public void  stop()
{
System.out.println("声卡停止");
}
@Override
public void pause()
{

System.out.println("声卡暂时坏了");
}

 

}

 

 

 

----------------------

public class MainBoard
{

public void usePci(Pci pci)
{
pci.start();
pci.stop();
pci.pause();

}

 

public void usePciStart(Pci pci)
{
pci.start();
}
public void usePciStop(Pci pci)
{
pci.stop();
}
public void usePciPause(Pci pci)
{
pci.pause();
}

}

 

 

 

---------------------

public class Mainclass
{

public static void main(String[] args)
{

SoundCard soundcard=new SoundCard();
MainBoard mainboard=new MainBoard();

mainboard.usePci(soundcard);
mainboard.usePciStart(soundcard);