abstract class BaseClass { public virtual void MethodA() { } public virtual void MethodB() { } } class Class1: BaseClass { public void MethodA(string arg){ } public override void MethodB(){ } } class Class2: Class1 { new public void MethodB(){ } } class MainClass { public static void Main(string[] args) { Class2 o = new Class2(); Console.WriteLine(o.MethodA()); } } 请问，o.MethodA调用的是 A: BaseClass.MethodA B: Class2.MethodA C: Class1.MethodA D: 都不是

Which two declarations prevent the overriding of a method？ （） A:  Final void methoda（）{} B:  Void final methoda（）{} C:  Static void methoda（）{} D:  Static final void methoda（）{} E:  Final abstract void methoda（）{}

在第2行中，方法methodA的有效返回类型returnType应该是

请说出下列程序的输出结果_____________，_____________。import java.io.IOException;public class E {public static void main(String args[]){try { methodA();}catch(IOException e){System.out.print("你好");return;}finally {System.out.println("thanks");}}public static void methodA() throws IOException{throw new IOException();}}

给出下列程序的输出结果。import java.io.IOException;public class E {public static void main(String args[]){int m =10;try {methodA();m = 100;}catch(IOException e){m = 1000;}System.out.println(m);}public static void methodA() throws IOException{throw new IOException();}}

import java.io.IOException；  public class ExceptionTest（  public static void main （String[]args）  try （  methodA（）；  ） catch （IOException e）  （  system.out.printIn（“Caught IOException”）；  ） catch （Exception e）   （  system.out.printIn（“Caught Exception”）；  ）  ）  public void methodA （）   {  throw new IOException （）；  }   What is the result？（） A:  The code will not compile. B:  The output is caught exception. C:  The output is caught IOException. D:  The program executes normally without printing a message.

以下程序的执行结果是？（）public static void main(String[] args) {// TODO 自动生成的方法存根try{methodA();}catch(IOException e){System.out.print("你好");}finally{System.out.print(" fine thanks.");}System.out.print(" end");}public static void methodA()throws IOException{System.out.print(" ok ");throw new IOException();}} A: ok 你好 fine thanks. end B: 你好 fine thanks. end C: ok 你好 end D: ok 你好 fine thanks.

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