【JAVA趣题】父类：public class A { A(){ System.out.print("a"); } A(String name){ System.out.print("a name"); }}子类：public class B extends A { B(){ this("abc"); System.out.print("b"); } B(String name){ System.out.print("b name"); }}测试类：public class Test { public static void main(String[] args) { B b=new B(); }}运行结果是？