Java IOException 无法解析为类型错误
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原文地址: http://stackoverflow.com/questions/20551475/
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IOException can not be resolved to a type error
提问by Cow
For my final in Java we have a "exceptions" part on the test with try, catch, and finally calls. When I try to put the example code into Eclipse I get errors in the catch and throw new areas. All of the errors say "Can not be resolved to type".
对于我的 Java 期末考试，我们在测试中有一个“异常”部分，包括 try、catch 和 finally 调用。当我尝试将示例代码放入 Eclipse 时，我在 catch 中遇到错误并抛出新区域。所有错误都说“无法解析输入”。
How do I fix this so I can learn/review what the code is supposed to be doing?
我该如何解决这个问题，以便我可以学习/查看代码应该做什么？
Q4 Class
Q4班
public static void main(String [] args)
{
Q4Exception q1 = new Q4Exception();
try{
q1.sampleMethod();
try{
q1.sampleMethod();
}
//This catch does not throw an error
catch(RuntimeException es)
{
System.out.println("A");
}
//This catch below throws the error of cannot be resolved to a type
catch(IOException es)
{
System.out.println("B");
}
//This catch does not throw an error
catch(Exception e)
{
System.out.println("C");
}
finally{
System.out.println("D");
}
}catch(Exception e)
{
System.out.println("E");
}
finally{
System.out.println("F");
}
}
Q4Exception Class
Q4Exception 类
public void sampleMethod() throws Exception
{
try{
throw new IOException("H");
}
catch(IOException err)
{
System.out.println("I");
throw new RuntimeException("J");
}
catch(Exception e)
{
System.out.println(e.toString());
System.out.println("K");
throw new Exception(“L");
}
catch(Throwable t)
{
System.out.println("M");
}
finally{
System.out.println("N");
}
}
采纳答案by Felipe Martins Melo
I think it's worth mentioning that in Eclipse, Ctrl+Shif+O does the job of resolving the imports for you.
我认为值得一提的是，在 Eclipse 中，Ctrl+Shif+O 会为您解决导入问题。
回答by Cow
Oh, guess I could answer my own question here. Didn't know I had to import the IOException from java.io!
哦，我想我可以在这里回答我自己的问题。不知道我必须从 java.io 导入 IOException！
回答by Dan Cartier
Easy to just use
易于使用
import java.io.*
for the imports
对于进口
回答by Osama Al-Banna
I discovered I was using an old version of JWT , the issue is gone after using the a newer version of JWT dependency .
我发现我使用的是旧版本的 JWT，使用较新版本的 JWT 依赖项后问题消失了。
