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单选题
类Student代码如下: class Student{ String name; int age; Student(String nm){ name = nm; } } 执行语句Student stu = new Student()后,字段age的值是哪项?()
A
0
B
null
C
false
D
编译错误
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有下列语句: struct Birthday{public int year; public int month; public int day;}; struct Student{ int no; string name; int age; public Birthday bir; }; …… Student Stu; 如果要把Stu的出生年份赋值为1988,正确的语句是()A、 Stu.bir.year=1988;B、 Stu.year=1988;C、 Stu. Birthday.year=1988;D、 Student. Birthday.year=1988;
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类Student代码如下: class Student{ String name; int age; Student(String nm){ name = nm; } } 执行语句Student stu = new Student()后,字段age的值是哪项?() A、 0B、 nullC、 falseD、 编译错误
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类Student的声明如下: package com.school class Student{ String name; int age; Student(String name,int age){ //code } void study(String subject){ / /code } } 正确调用方法study(String subject)的是哪项?() A、Student stu = new Student(“Tom”,23); stu.study(“数学”);B、Student.study(“数学”);C、Student stu = new Student(“Tom”,23); stu.study();D、Student stu = new Student(“Tom”,23); String result=stu.study(“数学”);
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下列有关类声明的代码片段,哪一项是正确的?() A、 import java.sql.*; package school; class Student{ }B、 package school; import java.sql.*; class Student{ }C、 package school; class Student{ } import java.sql.*;D、 package school; import java.sql.*;private String name; class Student{ }
考题
类 Student 中字段mark的缺省值是哪项?() Class Student{ String name; int age; float market; ········· } A、0.0fB、numllC、falseD、0E、0.0
考题
对于如下代码,描述正确的是哪项?() class Student{ public static void main(String[] args){ Student student=new Student(); } } A、new Student()创建了Student对象的一个实例B、Student student声明了对象Student的一个引用C、class Student声明了一个类D、new Student()创建了一个类E、Student student 声明了一个类
考题
对于如下代码,描述正确的是哪项? () class Student{ public static void main(String[] args){ Student student = new Student(); } } A、Student student 声明了一个类B、new Student()创建了Student 对象的一个实例C、Student student 声明了对象Student 的一个引用D、class Student 声明了一个类
考题
单选题类Student代码如下: class Student{ String name; int age; Student(String nm){ name = nm; } } 执行语句Student stu = new Student()后,字段age的值是哪项?()A
0B
nullC
falseD
编译错误
考题
多选题对于如下代码,描述正确的是哪项? () class Student{ public static void main(String[] args){ Student student = new Student(); } }AStudent student 声明了一个类Bnew Student()创建了Student 对象的一个实例CStudent student 声明了对象Student 的一个引用Dclass Student 声明了一个类
考题
单选题下列有关类声明的代码片段,哪一项是正确的?()A
import java.sql.*; package school; class Student{ }B
package school; import java.sql.*; class Student{ }C
package school; class Student{ } import java.sql.*;D
package school; import java.sql.*;private String name; class Student{ }
考题
单选题类Student代码如下:D class Student{ String name; int age; Student(String nm){ (构造方法) name = nm; } } 执行语句Student stu = new Student()后,字段age的值是哪项?()A
0B
nullC
falseD
编译错误
考题
单选题类Student的声明如下: package com.school class Student{ String name; int age; Student(String name,int age){ //code } void study(String subject){ / /code } } 正确调用方法study(String subject)的是哪项?()A
Student stu = new Student(“Tom”,23); stu.study(“数学”);B
Student.study(“数学”);C
Student stu = new Student(“Tom”,23); stu.study();D
Student stu = new Student(“Tom”,23); String result=stu.study(“数学”);
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