下列Java代码中Test类中的4个输出语句的输出结果依次是( )。class person {String name = “person”;public void shout() { System.out.println(name);}}class Student extends Person { String name =”student”; String school = “school”;}class Test { public static void main(String [] args){ Person p = new Student(); System.out.print(p instanceof Student); System.out.print(p instanceof Person); System.out.print(p instanceof Object); System.out.print(p instanceof System);
}
}
选项:
A:下列Java代码中Test类中的4个输出语句的输出结果依次是()。classperson{Stringname=“person”;publicvoidshout(){System.out.println(name);}}classStudentextendsPerson{Stringname=”student”;Stringschool=“school”;}classTest{publicstaticvoidmain(String[]args){Personp=newStudent();System.out.print(pinstanceofStudent);System.out.print(pinstanceofPerson);System.out.print(pinstanceofObject);System.out.print(pinstanceofSystem);
B:}
C:}
A:truefalsetruefalse
B:falsetruefalsetrue
C:truetruetrue编译错误
D:truetruefalse编译错误
发布时间:2024-03-31 19:40:17