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
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，SALES
B.null，SALES
C.smith，null
D.null，null
相关考题：
publicclassEmployee{privateStringname；publicEmployee（Stringname）{this.name=name；}publicStringgetName（）{returnname；}}publicclassManagerextendsEmployee{privateStringdepartment；publicManager（Stringname，Stringdepartment）{this.department=department；super（name）；（应于上一行掉位置）System.out.println（getName（））；}}Super的位置是否在方法的首行执行语句newManager（smith”，”SALES”）后程序的输出是哪项？（）A.smithB.nullC.SALESD.编译错误
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
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publicclassPlant{privateStringname;publicPlant(Stringname){this.name=name;}publicStringgetName(){returnname;}}publicclassTreeextendsPlant{publicvoidgrowFruit(){}publicvoiddropLeaves(){}}Whichistrue?() A.Thecodewillcompilewithoutchanges.B.ThecodewillcompileifpublicTree（）{Plant（）；}isaddedtotheTreeclass.C.ThecodewillcompileifpublicPlant（）{Tree（）；}isaddedtothePlantclass.D.ThecodewillcompileifpublicPlant（）{this（”fern”）；}isaddedtothePlantclass.E.ThecodewillcompileifpublicPlant（）{Plant（”fern”）；}isaddedtothePlantclass.
interface Playable {void play();}interface Bounceable {void play();}interface Rollable extends Playable, Bounceable {Ball ball = new Ball("PingPang");}class Ball implements Rollable {private String name;public String getName() {return name;}public Ball(String name) {this.name = name;}public void play() {ball = new Ball("Football");System.out.println(ball.getName());}}这个错误不容易发现。
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; }
23、下列程序的运行结果是【 】 class Demo{ private String name; Demo（String name){this.name = name;} private static void show（){ System.out.println（name) } public static void main（String[] args){ Demo d = new Demo（“lisa”); d.show（); } }A．输出lisaB．输出nullC．输出nameD．编译失败，无法从静态上下文中引用非静态变量name
3、下列程序的运行结果是【 】 class Demo{ private String name; Demo（String name){this.name = name;} private static void show（){ System.out.println（name) } public static void main（String[] args){ Demo d = new Demo（“lisa”); d.show（); } }A．输出lisaB．输出nullC．输出nameD．编译失败，无法从静态上下文中引用非静态变量name