标题: 有谁知道下面的题目怎么解吗 [打印本页] 作者: hxh362805079 时间: 2015-12-15 23:51 标题: 有谁知道下面的题目怎么解吗 public String show(D obj)...{
return ("A and D");
}
public String show(A obj)...{
return ("A and A");
}
}
class B extends A{
public String show(B obj)...{
return ("B and B");
}
public String show(A obj)...{
return ("B and A");
}
}
class C extends B...{}
class D extends B...{}
（二）问题：以下输出结果是什么？
A a1 = new A();
A a2 = new B();
B b = new B();
C c = new C();
D d = new D();
System.out.println(a1.show(b)); ①
System.out.println(a1.show(c)); ②
System.out.println(a1.show(d)); ③
System.out.println(a2.show(b)); ④
System.out.println(a2.show(c)); ⑤
System.out.println(a2.show(d)); ⑥
System.out.println(b.show(b)); ⑦
System.out.println(b.show(c)); ⑧
System.out.println(b.show(d)); ⑨