[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fQZ7w0gj86ttr9NI3-Bs2pGj0v7oHYDskDwZY0hjmnmU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2023-05-07 18:16:04",959652642,[8,9,10,11],"多态可以解决方法同名的问题","多态可以提高程序的可扩展性","多态可以提高程序的可维护性","在多态中,使用父类引用可以操作子类的所有方法",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000064429","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbba9f847de4a5315a5ebeddbb4eaa9c2.jpg","[公开课]Java编程基础","50299920","Java编程基础教程考试","下列关于多态的说法中,错误的是( )",[20,31,40,49,58,61,70,79,89,98],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],959652521,[24,25,26,27],"JDK是java开发核心组件,是用来编译解释java程序的核心组件","JDK包括Java编译器、Java文档生成工具、Java打包工具等","JRE是个单独的软件,所以安装JDK后,还需要单独安装JRE","JRE是java运行环境,用来支持java程序的运行","下列关于JDK和JRE的说法中,错误的是( )","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],959652631,[35,36,37,38],"异常对象","异常类","任意对象","任意类","在try{}catch(【 】e){}中,【 】处需要填写的是( )",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],959652632,[44,45,46,47],"变量","常量","方法","类","为了提高可读性和可维护性,您应该声明一个()来表示圆周率,而不是使用诸如3.14159的值",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":30},[],959652641,[53,54,55,56],"protected","static","private","final","如果父类的方法是静态的,则子类的方法被( )修饰才能覆盖父类的静态方法",{"answer":59,"createTime":5,"id":6,"options":60,"question":18,"source":29,"type":30},[],[8,9,10,11],{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":29,"type":30},[],959652645,[65,66,67,68],"dog1.equals(dog2)","s1.equals(s2)","s3.equals(s4)","dog1==dog2","阅读下段代码,class Dog {public String name;Dog(String name){this.name =name;}}public class Demo1 {public static void main(String[] args){Dog dog1 = new Dog(&quot;xiaohuang&quot;);Dog dog2 = new Dog(&quot;xiaohuang&quot;);String s1 = dog1.toString();String s2 = dog2.toString();String s3 = &quot;xiaohuang&quot;;String s4 = &quot;xiaohuang&quot;;}}返回值为true的是( )",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":29,"type":30},[],959652648,[74,75,76,77],"Error","Exception","RuntimeException","Throwable","自定义运行时异常,必须继承自( )类",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":29,"type":88},[],959652659,[83,84,85,86],"类名引用普通方法","类名引用静态方法","对象名引用方法","构造器引用方法","在JDK 8中,Lambda表达式支持的引用类型主要有( )",1,{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":29,"type":88},[],959652661,[93,94,95,96],"方法重写时,子类的函数名与形参列表必须与父类的一致","方法重写时,子类的返回值类型必须大于或者等于父类的返回值类型","方法重写时,子类的权限修饰符必须大于或者等于父类的权限修饰符","方法重写与返回值类型无关","以下关于方法重写,说法错误的是( )",{"answer":99,"createTime":5,"id":100,"options":101,"question":104,"source":29,"type":105},[],959652680,[102,103],"对","错","如果想通过外部类去访问内部类,则需要通过外部类对象去创建内部类对象.( )",3]