【单选题】下列程序的输出结果是 。 class F { public F() { System.out.print("F() is called!"); } } class S extends F { public S() { System.out.print("S() is called!"); } } class Ex_24 { public static void main(String ar...
【单选题】main方法中第二个println语句的输出是什么? public class Foo { int i; static int s; public static void main(String[] args) { Foo f1 = new Foo(); System.out.println("f1.i is " + f1.i + " f1.s is " + f1.s); Foo f2 = new...