[Java] 17-1 JAVA 인터페이스

package abstractNinterface17;
 
interface TV
{
    public void onTV();
}
 
interface Computer
{    
    public void dataReceive();
}
 
class ComputerImpl
{
    public void dataReceive()
    {
        System.out.println("영상 데이터 수신 중");
    }
    public void onTV()
    {
        System.out.println("영상 출력 중");
    }
}
 
class IPTV  implements Computer, TV
{
    ComputerImpl comp = new ComputerImpl();
    
    public void dataReceive()
    {
        comp.dataReceive();
    }
    public void onTV()
    {
        comp.onTV();
    }
    public void powerOn()
    {
        dataReceive();
        onTV();
    }
}
 
class CompileErrorExample
{    
 
    public static void main(String[] args)
    {
        IPTV iptv=new IPTV();
        iptv.powerOn();
        
        TV tv=iptv;
        Computer comp=iptv;
    }
}