请阅读下面的程序代码,选择正确的运行结果 Class Person{ void say(){ System.out.println(“hello”); } } class Example{ public static void main(String[] args){ Person p2 = new Person(); Person p1 = new Person(); p1.say(); p2.say();} }
举一反三
- 阅读下面的代码： class Person{ void say(){ System.out.println("hello"); } } class Example{ public static void main(String[] args){ Person p1 = new Person(); Person p2 = new Person(); p2.say(); p1.say(); p2=null; p2.say(); } } 下列选项中，哪个是程序的输出结果？（）
- 阅读下列的程序 class Person{ static{ System.out.println("static") } Person(){ System.out.println("构造") } } class Demo{ public static void main(String[] args){ Person p = new Person(); } } 下列选项中,程序的运行结果是()
- class Person{ static{ System.out.println(name); } private static String name = "hello"; } class Demo{ public static void main(String[] args){ Person p = null; } }
- 以下代码执行后的结果是: public class Person { String name = “小芳”; public Person(String name) { name = “小兰”; } public void show() { this.name = “小翠”; } public static void main(String[] args) { Person p = new Person(“小凤”); System.out.print(p.name); p.show(); System.out.print(p.name); } }
- 已有如下程序： class Person{ private int a; public void change(int m){a=m;} } public class Teacher extends Person { public int b; public static void main(String args[]){ Person p=new Person(); Teacher t=new Teacher(); int i; _____________________ } } 下面划线处填写的语句那些是非法的操作 提示：考查内容包括静态成员，私有成员，继承等知识点