JAVA初学者 抛出异常选择题 - Java / Java SE

 Consider the following Java program segment. 

import java.io.*;

public class SomeClass{

  public void x() {

  throw new RuntimeException("Exception from x");
  }
  
  public void y(){

  throw new IOException("Exception from y");
  }
}
Which of the following is true concerning the definitions for the methods x and y? 
 
 

 (a) Neither x nor y has a legal definition.
 (b) Both x and y have legal definitions.
 (c) x has an illegal definition, but y has a legal definition.
 (d) x has a legal definition, but y has an illegal definition.  


不会做……大侠帮忙~！谢谢~！

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我只知道
public void y(){

  throw new IOException("Exception from y");
  }
这是错的
我不知道洋文

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引用

我只知道
public void y(){

throw new IOException("Exception from y");
}
这是错的
我不知道洋文

嗯嗯，答案是x是合法的，y是不合法的，为什么呀？

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选D，RuntimeException不需要异常声明，IOException需要
所以y应该声明为public void y() throws IOException

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我选C，不知对错，请高手指点！

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答案是D，因为x抛的是runtime的exception，改异常不catch也是可以滴