adventure12.java

JAVA编程思想第四版英文原版习题答案. pdf原版的

// interfaces/Adventure12.java
// TIJ4 Chapter Interfaces, Exercise 12, page 328
/* In Adventure.java, add an interface called CanClimb, following
* the form of the other interfaces.
*/

interface CanFight {
	void fight();
}

interface CanSwim {
	void swim();
}

interface CanFly {
	void fly();
}

interface CanClimb {
	void climb();
}

class ActionCharacter {
	public void fight() {}
}

class Hero extends ActionCharacter 
		implements CanFight, CanSwim, CanFly {
	public void swim() {}
	public void fly() {}	
}

public class Adventure12 {
	public static void t(CanFight x) { x.fight(); }
	public static void u(CanSwim x) { x.swim(); }
	public static void v(CanFly x) { x.fly(); }
	public static void c(CanClimb x) { x.climb(); }	
	public static void w(ActionCharacter x) { x.fight(); }
	public static void main(String[] args) {
		Hero h = new Hero();
		t(h); // Treat it as a CanFight
		u(h); // Treat it as a CanSwim
		v(h); // Treat it as a CanFly
		c(h); // Treat it as a CanClimb
		w(h); // Treat it as an ActionCharacter
	}
}