[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f5t9dYq_G32sx0DrdDgIXvkCddDFxnMeDCOa_Bc-isRI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":24,"type":107},[],"2023-12-20 20:25:41",118523707,[],{"courseId":9,"courseImg":10,"courseName":11},"0ace1621ce7a5b2ac5f3473b7031ac9e","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6d0846c25381bae4f747e249d16c8f3b.png","面向对象程序设计（Java）","读下面程序,写出程序运行结果. class Point{ int x; public Point(){x=0;} public Point(int x){this.x=x;} public void show(){System.out.println(x);}} class SPoint extends Point{ int y; public SPoint(){y=0;} public SPoint(int x,int y){super(x); this.y=y;} public void show(){System.out.println(x+","+y);}} public class tempDemo{ public static void main(String []args){ Point p=new Point(); p.show(); Point p1=new Point(2); p1.show(); SPoint sp=new SPoint(); sp.show(); SPoint sp1=new SPoint(2,3); sp1.show(); }} 运行结果为",[14,26,35,44,53,62,71,80,89,98],{"answer":15,"createTime":16,"id":17,"options":18,"question":23,"source":24,"type":25},[],"2023-12-20 20:25:40",118523622,[19,20,21,22],"若某SQL语句只执行一次,则建议通过Statement实例来执行","PrepareStatement是执行预编译,执行效率高,方便批处理","PrepareStatement是Statement的子接口","PrepareStatement和Statement接口没有什么区别,可随便选用","下面有关Statement和PrepareStatement的描述,错误的是()","v1",0,{"answer":27,"createTime":16,"id":28,"options":29,"question":34,"source":24,"type":25},[],118523623,[30,31,32,33],"服务器和客户使用InputStream和OutputStream进行通信","服务器分配一个端口号.如果客户请求一个连接,服务器使用accept()方法打开socket连接","其它选项都是","客户在host的port端口建立连接","在Java编程语言中,TCP\u002FIPsocket连接是用java.net包中的类实现的.其连接步骤和方法是( )",{"answer":36,"createTime":16,"id":37,"options":38,"question":43,"source":24,"type":25},[],118523624,[39,40,41,42],"一个","两个","三个","多个","一个DatagramSocket对象一次允许数据报发送的目的地址是( )",{"answer":45,"createTime":16,"id":46,"options":47,"question":52,"source":24,"type":25},[],118523628,[48,49,50,51],"一个java文件可以包含一个或多个类的定义","一个java文件最多有一个主类,即只有一个类能声明为public","java文件中主类名称要与java文件名相同","一个java文件只能包含一个class类","2.1 下面有关java文件和class类的描述,错误的是( )",{"answer":54,"createTime":16,"id":55,"options":56,"question":61,"source":24,"type":25},[],118523630,[57,58,59,60],"TomJohn","TomJohnTom","JohnTom","JohnTomTom","{若有下面程序代码:public class Demo {public static void main(String[] args) {HashSet<String> set = new HashSet<String>();set.add("Tom");set.add("John");set.add("Tom");Iterator it = set.iterator();while(it.hasNext()){Object obj = it.next();System.out.print(obj);}}}则程序运行结果是( )}",{"answer":63,"createTime":16,"id":64,"options":65,"question":70,"source":24,"type":25},[],118523635,[66,67,68,69],"唤醒所有等待的线程","唤醒当前等待的线程","唤醒就绪的线程","不需要知道哪个线程直接唤醒","2.9 下面关于notify()说法正确的是( )",{"answer":72,"createTime":16,"id":73,"options":74,"question":79,"source":24,"type":25},[],118523638,[75,76,77,78],"构造方法是一个特殊的成员方法","对象是类的具体实例","对象之间是相互独立的","一个对象可以不属于任何类","下面描述错误的是( )",{"answer":81,"createTime":16,"id":82,"options":83,"question":88,"source":24,"type":25},[],118523643,[84,85,86,87],"Employee e=new Employee ()","Director d =new Employee ()","Employee e=new Manager()","Employee d =new Director ()","已知类的继承关系如下: class Employee{} class Manager extends Employee{} class Director extends Employee{} 则下列语句错误的是( )",{"answer":90,"createTime":16,"id":91,"options":92,"question":97,"source":24,"type":25},[],118523647,[93,94,95,96],"ArrayList","TreeSet","HashSet","HashMap","下列是按<E>模式且存储无序可重复数据的类是( )",{"answer":99,"createTime":16,"id":100,"options":101,"question":106,"source":24,"type":25},[],118523650,[102,103,104,105],"Object s1 = p1.newInstance()","Student s1 = p1.newInstance()","Constructor<?> cons = p1.getConstructor( new Class[]{int.class}); Object obj1 = cons.newInstance(new Object[]{1})","Constructor<?> cons = p1.getConstructor( int.class); Object obj1 = cons.newInstance(1)","9.82 若已执行语句Class<?> p1=Student.class,其中Student定义了两个构造方法:Student(){}; Student(int stuNo){},则下面通过p1 来获取Student类对象的语句中,错误的是( )",2]