网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
类Teacher:classTeacher{Stringname;floatsalary;Teacher(Stringname){this.name=name;}Teacher(Stringname,floatsalary){this.name=name;this.salary=salary;}}执行语句Teachert=newTeacher(Tom”,2000.0f);后,字段salary的值是哪一项?()
A.2000.0f
B.0.0f
C.null;
D.2000
参考答案
更多 “ 类Teacher:classTeacher{Stringname;floatsalary;Teacher(Stringname){this.name=name;}Teacher(Stringname,floatsalary){this.name=name;this.salary=salary;}}执行语句Teachert=newTeacher(Tom”,2000.0f);后,字段salary的值是哪一项?()A.2000.0fB.0.0fC.null;D.2000 ” 相关考题
考题
在Windows下,下列文件名中正确的一个是()。
A、teacher and studentB、teacher:studentC、teacher/studentD、teacher?student
考题
publicclassEmployee{privateStringname;publicEmployee(Stringname){this.name=name;}publicvoiddisplay(){System.out.print(name);}}publicclassManagerextendsEmployee{privateStringdepartment;publicManager(Stringname,Stringdepartment){super(name);this.department=department;}publicvoiddisplay(){System.out.println(super.display()+”,”+department);}}执行语句newManager(smith”,”SALES”)后程序的输出是哪项?()A.smith,SALESB.null,SALESC.smith,nullD.null,null
考题
publicclassPet{privateStringname;publicPet(Stringname){this.name=name;}publicvoidspeak(){System.out.print(name);}}publicclassDogextendsPet{publicDog(Stringname){super(name);}publicvoidspeak(){super.speak();System.out.print(Dog”);}}执行代码Petpet=newDog(京巴”);pet.speak();后输出的内容是哪项?()A.京巴B.京巴DogC.nullD.Dog京巴
考题
publicclassPerson{privatename;publicPerson(Stringname){this.name=name;}publicbooleanequals(Objecto){if(!oinstanceofPerson)returnfalse;Personp=(Person)o;returnp.name.equals(this.name);}}Whichistrue?()
A.CompilationfailsbecausethehashCodemethodisnotoverridden.B.AHashSetcouldcontainmultiplePersonobjectswiththesamename.C.AllPersonobjectswillhavethesamehashcodebecausethehashCodemethodisnotoverridden.D.IfaHashSetcontainsmorethanonePersonobjectwithname=”Fred”,thenremovinganother person,alsowithname=”Fred”,willremovethemall.
考题
publicclassPerson{privatename;publicPerson(Stringname){this.name=name;}publicinthashCode(){return420;}}Whichistrue?()
A.ThetimetofindthevaluefromHashMapwithaPersonkeydependsonthesizeofthemap.B.DeletingaPersonkeyfromaHashMapwilldeleteallmapentriesforallkeysoftypePerson.C.InsertingasecondPersonobjectintoaHashSetwillcausethefirstPersonobjecttoberemovedasaduplicate.D.ThetimetodeterminewhetheraPersonobjectiscontainedinaHashSetisconstantanddoesNOTdependonthesizeofthemap.
考题
Person p = new Person(“张三”,23);这条语句会调用下列哪个构造方法给属性进行初始化()
A.public Person(){}B.public Person(String name,int age) { this.name = name; this.age = age; }C.public Person(int age,String name) { this.age = age; this.name = name; }D.public Person(String name) { this.name = name; }
考题
以下字符串定义错误的是___________。A.char s[7]="Teacher";B.char s[]="Teacher";C.char s[10]={"Teacher"};D.char s[10]="Teacher";
考题
3、下面对象的声明正确的是()。A.Teacher t1;B.Teacher t2=class Teacher();C.Teacher t3=new Teacher();D.Teacher t4=Teacher();
考题
下面对象的声明正确的是()。A.Teacher t1;B.Teacher t2=class Teacher();C.Teacher t3=new Teacher();D.Teacher t4=Teacher();
热门标签
最新试卷