Catching java exceptions FileNotFound and IOException at the same time

Question

Is the FileNotFoundException somehow a "sub-exception" of the IOException?

This is my code opening an input stream to a file at the given path:

   method(){
        FileInputStream fs;
        try {
            fs = new FileInputStream(path);
            //
            fs.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

How come I can neglect the FileNotFound and just catch the IOException instead? Is the FNFException a part of the IOException?

Instead of catching the exceptions, what if I throw an IOException in my method?

    method() throws IOException{

        FileInputStream fs;
        fs = new FileInputStream(path);
        //
        fs.close();

    }

Can I proceed to catch a FileNotFoundException at the invoking method like this?

    try {

         method();

    }catch (FileNotFoundException e1) {}

Thanks for any help you might be able to provide!

Answer 1

Is the FileNotFoundException somehow a "sub-exception" of the IOException?

Yes, FileNotFoundException extends IOException:

java.lang.Object
    java.lang.Throwable
        java.lang.Exception
            java.io.IOException
                java.io.FileNotFoundException

How come I can neglect the FileNotFound and just catch the IOException instead?

Catching a base class of the exception being thrown will catch the exception, unless there is a more specific catch clause available.

Can I proceed to catch a FileNotFoundException at the invoking method like this?

Absolutely! In fact, this is a good thing to do: your code should handle only the exceptions with which it knows how to deal, and let all other exceptions propagate to a place where it could be dealt with in a better way.