设有下面两个类的定义: class Person{ long id;// 身份证号 String name://姓名 } class Student extends Person{ int score://成绩 int getScore( ){ return score; } } 则类Person和类Student的关系是( )。A.包含关系B.继承关系C.关联关系D.无关系
设有下面两个类的定义: class Person{ long id;// 身份证号 String name://姓名 } class Student extends Person{ int score://成绩 int getScore( ){ return score; } } 则类Person和类Student的关系是( )。
A.包含关系
B.继承关系
C.关联关系
D.无关系
相关考题:
为使下列代码正常运行,应该在下划线处填入的选项是abstract class Person{public Person(String n)!name=n;}public____String getDescription();public String getName(){return name;}private String name;}A.staticB.privateC.abstractD.final
阅读下列代码段 abstract class Person{ public Person(String n){ name=n; } public______String getDescription(); public String getName(){ } private String name; } 在下画线处应填入的修饰符是A.staticB.abstractC.protectedD.final
设有下列两个类的定义,则类Person和类Man的关系是( )。 class Person { long id; //身份证号 String name; //姓名 } class Man extends Person { int age; //年龄 int getAge() { return age; } }A.包含关系B.继承关系C.关联关系D.无关系,上述类定义有语法错误
有如下定义struct person{char name[9];int age;};struct person class[10]={"John",17,"paul",19,"Mary",18,"Adam",16,};根据上述定义,能输出字母M的语句是A.printf("%c\n",class[3].name);B.printf("%c\n",class[3].name[1]);C.printf("%c\n",class[2].name[1]);D.printf("%c\n",class[2].name[0]);
class Person{ String name,department; int age; public Person(Stringn){name=n;} public Person(String n, int a){name=n;age=a;} publicPerson(String n,String d,int a){ doing the same as two argumentsversion of constructer including assignment name=n,age=a } } 下列哪一个选项可以添加到“doing the same....”处?()APerson(n,a)Bthis(Person(n,a))Cthis(n,a)Dthis(name,age
给出下列的不完整的类代码,则哪个语句可以被加到横线处? ( ) class Person{ String name,department; int age; public Person(String n){name=n;} public Person(String n,int s){name=n; age=a;} public Person(String n,String d,int a){ department=d;______ } }A.Person(n,a);B.this(Person(n,a));C.this(n,s);D.this(name,age);
设有下面两个类的定义:classperson{longid;//身份证号stringname;//姓名}classstudentextendsperson{intscore;//入学总分intgetscore(){returnscore;}}则类person和类student的关系是_________。 A.关联关系B.上述类定义有语法错误C.继承关系D.包含关系
下列程序运行后的输出结果是( )。#include#includeusing namespace std;class Person{public:Person(string n):name(n) { coutprivate:int year,month,day;};class Student:public Person{public:Student(string n,int y,int m,int d,char c):birthday(y,m,d),sex(c),Person(n) { coutA. SB.PSC.DPSD.PDS
阅读下面代码 abstract class Person { public Person(String n) { name=n; } public______String getDescription(); public String getName() { return name; } private String name; } 在下画线处应填入的修饰符是A.staticB.abstractC.protectedD.final
给出下列的不完整的类代码,则下列的( )语句可以加到横线处。 class Person{ String name,department; int age public Person(String n){name=n;} public Person(String n,int a){name=n;age=a;} pubilc Person(String n,String d,int a) { _______________ department=d; } }A.Person(n,a);B.this(Person(n,a));C.this(n,a);D.this(name,age);
有如下定义: struct person {char name[9];int age;} struct person class[10]={ "John",17, "Paul",19, "Mary",18, "Adam",16}; 能输出字母M的是( )A.printf("%c\n",class[3].name);B.printf("%c\n",class[3].name[1]);C.printf("%c\n",class[2].name[1]);D.printf("%c\n",class[2].name[0]);
根据下面的定义,能打印出字母M的语句是( )。 struct person { char name[9]; int age; }; struct person class[10]={"John",17,"Paul",19,"Mary",18,"Adam",16};A.printf("%c\n",class[3].name};B.printf("%c\n",class[2].name[0]);C.printf("%c\n",class[3].name[1]);D.printf("%c\n",class[2].name[1]);
给出下面不完整的类代码,则横线处的语句应该为( )。 class Person { String name,department; int age; public Person (Strings) {name=s;} public Person (String s,intA.{name=s;age=a;} public Person (String n,String d,intA){ __________ department=d; } }A)Person (n,A);B.this (Person(n,A));C.this(n,A);D.this(name,age);
设有下列两个类的定义,则类Person和类Man的关系是 ( ) class Person{ long id;//身份证号 Stringname;//姓名 } class Man extends Person{ int age;//年龄 int getScore(){ return score; } }A.包含关系B.继承关系C.关联关系D.无关系,上述类定义有语法错误
设有下面两个类的定义: class Person{ long id // 身份证号 String name; //姓名 } class Student extends Person{ int score: //成绩 int getScore ( ) { return score; } } 则类Person和类Student的关系是( )。A.包含关系B.继承关系C.关联关系D.无关系
为使下列代码正常运行,应该在下画线处填入的选项是( )。 abstract class person{ public Person(String n){ name=n: } Public String getDescription; public String getName{ return name; } private string name; }A.staticB.privateC.abstractD.final
根据下述定义,能输出字母M的语句是( )。struct person { char name[9]; int age;}class[10]={"Johu",17,"Paul",19,"Mary",18,"Adam",16}; A、prinft("%c\n",class[3].nane);B、pfintf("%c\n",class[3].name[1]);C、prinft("%c\n",class[2].name[1]);D、printf("%c\n",class[2].name[0])
设有下面两个类的定义。 class Person { long id; // 身份证号 String name; // 姓名 } class Student extends Person { int score; // 入学总分 } intgetScore() { return score;} } 则类Person和类Student的关系是? } A.包含关系B.继承关系C.关联关系D.上述类定义有语法错误
以下程序的调试结果为?public class Outer{public String name = "Outer";public static void main(String argv[]){Inner i = new Inner();i.showName();}private class Inner{String name =new String("Inner");void showName(){System.out.println(name);}}}A.输出结果 OuterB.输出结果 InnerC.编译错误,因Inner类定义为私有访问D.在创建Inner类实例的行出现编译错误
public class Person { private String name, comment; private int age; public Person(String n, int a, String c) { name = n; age = a; comment = c; } public boolean equals(Object o) { if(! (o instanceof Person)) return false; Person p = (Person)o; return age == p.age name.equals(p.name); } } What is the appropriate definition of the hashCode method in class Person?() A、 return super.hashCode();B、 return name.hashCode() + age * 7;C、 return name.hashCode() + comment.hashCode() /2;D、 return name.hashCode() + comment.hashCode() / 2 - age * 3;
类Account中字段声明正确的是?() A、class Account{ name; amount; }B、class Account{ String name; double amount; }C、class Account{ String name=1.0; double amount=”Mike”; }D、class Account{ String name=”Mike”,double amount=1000.0; }
在C#中,假设Person是一个类,而ITeller是一个接口,下面的()类声明是正确的。A、class Employee:Person,ITeller B、class Employee:ITeller,PersonC、class Employee-Person,ITellerD、class Employee:Person / ITeller
我们定义一个Account类来描述银行账户,银行账户有账户名、金额等属性特征,同时有存款、取款等行为特征,下述代码适合描述的是哪项?() A、class Accountf String name;//账户 S tring amount; //金额 Account (String name)( ) void deposit (double mount){ //存款 ) void withdraw (double mount){ //取款 } )B、class Accountf String name;//账户d ouole amount; //金额 Account(double amount){ } void deposit (double mount){ //存款 ) void withdraw (double mount){ //取款 ) )C、class Accountf String name;//账户 double amount; //金额 Account (String name){} void deposit (double mount){//存款 ) void withdraw (double mount){ //取款 ) )D、class Accountf String name;//账户 double amount;//金额 Account (String name){} void deposit(){//存款 ) void withdraw(){//取款 ) )
public class Plant { private String name; public Plant(String name) { this.name = name; } public String getName() { return name; } } public class Tree extends Plant { public void growFruit() { } public void dropLeaves() { } } Which is true?() A、 The code will compile without changes.B、 The code will compile if public Tree() { Plant(); } is added to the Tree class.C、 The code will compile if public Plant() { Tree(); } is added to the Plant class.D、 The code will compile if public Plant() { this(”fern”); } is added to the Plant class.E、 The code will compile if public Plant() { Plant(”fern”); } is added to the Plant class.
11. class Person { 12. String name = “No name‟; 13. public Person(String nm) { name = nm; } 14. } 15. 16. class Employee extends Person { 17. String emplD = “0000”; 18. public Employee(String id) { empID = id; } 19. } 20. 21. public class EmployeeTest { 22. public static void main(String[] args) { 23. Employee e = new Employee(”4321”); 24. System.out.println(e.empID); 25. } 26. } What is the result?() A、 4321B、 0000C、 An exception is thrown at runtime.D、 Compilation fails because of an error in line 18.
如果你想要自动加载类,下面哪种函数声明是正确的?()A、function autoload($class_name)B、function__autoload($class_name,$file)C、function__autoload($class_name)D、function_autoload($class_name)E、function autoload($class_name,$file)
单选题public class Person { private String name, comment; private int age; public Person(String n, int a, String c) { name = n; age = a; comment = c; } public boolean equals(Object o) { if(! (o instanceof Person)) return false; Person p = (Person)o; return age == p.age name.equals(p.name); } } What is the appropriate definition of the hashCode method in class Person?()A return super.hashCode();B return name.hashCode() + age * 7;C return name.hashCode() + comment.hashCode() /2;D return name.hashCode() + comment.hashCode() / 2 - age * 3;
单选题Given the uncompleted code of a class: class Person { String name, department; int age; public Person(String n){ name = n; } public Person(String n, int a){ name = n; age = a; } public Person(String n, String d, int a) { // doing the same as two arguments version of constructor // including assignment name=n,age=a department = d; } } Which expression can be added at the "doing the same as..." part of the constructor?()A Person(n,a);B this(Person(n,a));C this(n,a);D this(name,age);