[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1P4O1XAAiVLdFWAHhX3oz71QZ1Sgr6PRrl4ml7x-Ew4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2023-12-10 19:50:12",112747705,[8,9,10,11],"抽象类既可以做父类,也可以做子类","abstract和final能同时修饰一个类","抽象类中可以没有抽象方法,有抽象方法的类一定是抽象类或接口","声明为final类型的方法不能在其子类中重新定义",{"courseId":13,"courseImg":14,"courseName":15},"af244c2ffee1cf87740495f874790b26","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8833637cf82ea173f677074671647ec2.png","2023-2024-1 面向对象程序设计（Java）","下面说法不正确的是( )",[18,29,38,47,56,65,74,83,90,93],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],112747690,[22,23,24,25],"5 个字节码文件,以".java"为扩展名","2 个字节码文件,以".java"为扩展名","5 个字节码文件,以".class"为扩展名","2 个字节码文件,以".class"为扩展名","3.编译一个定义了两个类和三个方法的 Java 源程序文件,总共会产生( )个字节码文件","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],112747691,[33,34,35,36],"2018112101","2018112102","2018112103","2018112104","第8章课后作业",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],112747693,[42,43,44,45],""23"",""123"",""12"",""234"","以下Java语句中,String str ="123456789";str =str.subString(1,3);执行后str中的值为( )",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],112747694,[51,52,53,54],"一次可以实现多个接口","一次只能实现一个接口","不能实现接口","不一定","一个类实现接口的情况是( )",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":27,"type":28},[],112747696,[60,61,62,63],"隐藏","覆盖","重载","Java不支持此特性","在Java中,一个类可同时定义许多同名的方法,这些方法的形式参数个数、类型或顺序各不相同,传回的值也可以不相同.这种面向对象程序的特性称为( )",{"answer":66,"createTime":5,"id":67,"options":68,"question":73,"source":27,"type":28},[],112747698,[69,70,71,72],"String args","String args[]","Char arg","StringBuffer args[]","Java application中的主类需包含main方法,以下哪项是main方法的正确形参? ( )",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":27,"type":28},[],112747699,[78,79,80,81],"int[] ary=new int[3]","int(3) ary=new int(3)","int ary=new int(3)","int ary[]=new int(3)","定义一个长度为3的整型数组的语句是( )",{"answer":84,"createTime":5,"id":85,"options":86,"question":89,"source":27,"type":28},[],112747702,[87,88],"2018113001","2018113002","本周作业",{"answer":91,"createTime":5,"id":6,"options":92,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":94,"createTime":5,"id":95,"options":96,"question":101,"source":27,"type":28},[],112747708,[97,98,99,100],"java的标准输入对象为System.in","打开一个文件时不可能产生IOException","使用File对象可以判断一个文件是否存在","使用File对象可以判断一个目录是否存在","下列说法错误的是( )"]