• Player

// Power
package ch08_interface;

public interface Power {
	
	public void on();
	
	public void off();
	
}
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// Volume
package ch08_interface;

public interface Volume {
	
	public void up();
	
	public void down();

}
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//Player
package ch08_interface;

public class Player implements Power, Volume {

	@Override
	public void up() {System.out.println("- 소리 UP -");}

	@Override
	public void down() {System.out.println("- 소리 DOWN -");}

	@Override
	public void on() {System.out.println("- 전원 ON -");}

	@Override
	public void off() {System.out.println("- 전원 OFF -");}
	
	
}