void play();
}
interface Bounceable {
void play();
}
interface Rollable extends Playable, Bounceable {
B．all ball = new Ball("PingPang");
}
class Ball implements Rollable {
private String name;
public String getName() {
return name;
}
public Ball(String name) {
this.name = name;
}
public void play() {
ball = new Ball("Football");
System.out.println(ball.getName());
}
}
这个错误不容易发现。
[试题]interface Playable {void play();}interface Bounceable {void play();}interface Rollable extends Playable, Bounceable {B．all ball = new Ball("PingPang");}class Ball implements Rollable {private String name;public String getName() {return name;}public
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