in the following statement, if throw T1 is replaced with throw t, there will be a compilation error. Why is must be caught or declared to be thrown,?
try{
FileInputStream fis = new FileInputStream(file);
Throwable t = null;
try{
fis.read();
}catch (Throwable t1){
t = t1;
throw t1;
} finally{
...
}
} catch(Exception e){
...
} except for RuntimeException and its subclasses, all exceptions are handled
I wonder if you can compile throw T1?
Edit:
the outermost catch is Exception , and t is Throwable , which is the parent object of Exception and cannot be captured. You can change the outermost Exception to Throwable to see
, while T1 is actually IOException , so you can capture
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