[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f9ddia0DINAhL-S4R9SzmmZssL5yHqCaMByJRIKh15fM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-02 21:08:52",42841556,[8,9,10,11],"C x = new B( )","B x = new C( )","C x = new C( )","B x = new B( )",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},82,"705281d4ac8dd1f61ed4e9e955d5932b","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F31fffd9b1ab8ed93a1abd0aec5eb6142.jpg","面向对象程序设计","exam_94245776","第三、四章复习(1)","已知类B是类C的父类,则不正确的语句是( )",[21,32,41,50,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],42841553,[25,26,27,28],"int Sub(int x) {……}","Sub Sub(int x) {……}","void Sub(int x) {……}","Sub(int x) {……}","( )是类Sub的正确构造方法","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],42841554,[36,37,38,39],"包","接口","方法","对象","在Java程序中,( )是最基本的元素",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],42841555,[45,46,47,48],"B.class","B.java","A.class","A.java","对于下面代码,正确的Java源程序文件名是( ). class A { void method1() { System.out.println("Method1 in class A"); } } public class B { void method2() { System.out.println("Method2 in class B"); } public static void main(String[] args) { System.out.println("main() inclass B"); } }",{"answer":51,"createTime":5,"id":6,"options":52,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],42841557,[57,58,59,60],"sizeof","interface","extends","instanceof","采用( )运算符可以判断一个对象是否类的实例",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],42841558,[66,67,68,69],"编译错误","Base method Child MethodB","Base method","Child methodB","编译运行如下Java代码,输出结果是( ). class Base { public void method(){ System.out.print ("Base method"); } } class Child extends Base{ public void methodB(){ System.out.print ("Child methodB"); } } public class Sample { public static void main(String[] args) { Base base= new Child(); base.methodB(); } }",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],42841559,[75,76,77,78],"0","1","编译失败","2","有如下代码,则该程序运行时输出结果是( ). class Test{ public void show() { static int i=0; i++; System.out.println(i);; }} public class Test3 { public static void main(String[] args) { Test test=new Test(); test.show(); }}",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],42841560,[84,85,86,87],"为对象返回一个引用","为对象分配内存空间","调用类的构造方法","产生一个新的类","( )不是Java语言中new操作符的作用",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],42841561,[93,94,95,96],"Base Obj = new Base( )","Derived Obj = new Derived( )","Derived Obj = new Base( )","Base Obj = new Derived( )","Derived类是Base类的子类,下面( )语句是错误的",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],42841562,[102,103,104,105],"可以使用"对象.方法名"来调用静态方法","需要先创建实例对象后才可以调用静态方法","静态方法并不属于调用它的对象,所以不能用静态方法来访问实例属性","可以使用"类名.方法名"来调用静态方法","关于静态方法的描述,错误的是( )"]