单项选择题
现有:
class TestA {
public void start() { System.out.println("TestA"); } }
public class TestB extends TestA {
public void start() { System.out.println("TestB"); } public static void main (string[] args) ( ((TestA)new TestB()).start(); ) }
运行结果是哪项?()
A. TeStA
B. TeStB
C.编译失败
D.运行时抛出异常