CODEWITHSUNDEEP
javafileexceptiontry-catchjava.util.scanner
Mr Guliarte
Mr Guliarte

Reputation: 739

Java: Scanner not accepting try-catch class error when reading from file

At Java 8 documentation, it is written that the constructor from Scanner which receives a File Source as parameter throws a FileNotFoundException. But take a look at the following code:

  try{
            sc = new Scanner("Rede.txt");      //This archive already exists
        }
        catch(FileNotFoundException f){
            f.printStackTrace;
        }
        finally{
            sc.close();
        }

When I run it, I get something like:

error:exception FileNotFoundException is never thrown in body of corresponding try statement
              catch(FileNotFoundException f){

Same happens with IOException. The curious is that, if I throw away the try-catch part, the code compiles.

What is wrong here?

Upvotes: 0

Views: 52

Answers (1)

Radiodef
Radiodef

Reputation: 37875

Scanner can also scan a String. To see what I mean, try:

System.out.println( new Scanner("Rede.txt").next() );

It will print Rede.txt.

Some other classes (like e.g. FileInputStream) will take a String path, but Scanner doesn't. If you want to use a file, you need to actually pass it a File:

sc = new Scanner(new File("Rede.txt"));

Upvotes: 4

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