【单选题】下列程序编译并运行的结果是( ) public class Test extends Demo{ public void fun() { System. out .println( "Test 类的fun方法" ); } public static void main(String[] args) { new Test().fun(); } } class Demo{ public final...
【单选题】下列程序编译并运行的结果是( ) public class Test{ public static void main(String[] args) { System. out .print( new GraduateStudent ()); } } class Person{ public String toString(){ return "Person" ; } } class Stu...