【判断题】已知有如下代码: package a; public abstract class Animal{ public abstract void run(){ System.out.println("running"); } public void walk(){ System.out.println("walking"); } } 请判断代码正确与否?
【单选题】已知有如下代码: package a; class A{ protected void aMethod(){ System.out.println("A"); } } package b; public class B extends A{ public void bMethod(){ aMethod(); System.out.println("B"); } public static void...