IOException无法解决为类型错误 [英] IOException can not be resolved to a type error
本文介绍了IOException无法解决为类型错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
对于Java的最终结业,我们在测试中包含try,catch和finally调用的例外部分。当我尝试将示例代码放入Eclipse时,遇到了错误并抛出了新的领域。所有错误都显示无法解析键入。
如何解决此问题,以便我可以学习/查看代码应该做什么? / p>
Q4类
public static void main(String [] args)
{
Q4Exception q1 =新的Q4Exception();
try {
q1.sampleMethod();
try {
q1.sampleMethod();
}
//此捕获不会引发错误
catch(RuntimeException es)
{
System.out.println( A);
}
//此下面的catch引发无法解决类型为
catch(IOException es)
{
System.out.println( B );
}
//此捕获不会引发错误
catch(异常e)
{
System.out.println( C);
}
最终{
System.out.println( D);
}
} catch(异常e)
{
System.out.println( E);
}
最终{
System.out.println( F);
}
}
Q4Exception类
public void sampleMethod()抛出异常
{
try {
throw new IOException( H);
}
catch(IOException err)
{
System.out.println( I);
抛出新的RuntimeException( J);
}
catch(异常e)
{
System.out.println(e.toString());
System.out.println( K);
throw new Exception( L);
}
catch(Throwable t)
{
System.out.println( M);
}
最终{
System.out.println( N);
}
}
解决方案
我认为值得一提的是,在Eclipse中,Ctrl + Shif + O可以为您解决导入问题。
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".
How do I fix this so I can learn/review what the code is supposed to be doing?
Q4 Class
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
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");
}
}
解决方案
I think it's worth mentioning that in Eclipse, Ctrl+Shif+O does the job of resolving the imports for you.
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