CODEWITHSUNDEEP
javaexceptiontry-catchfilenotfoundexception
MR JACKPOT
MR JACKPOT

Reputation: 214

Java unreachable catch block for FileNotFoundException

I am confused currently as to why I am receiving "unreachable catch block for FileNotFoundException." when I try to run my code. I am taking in a file path from the main method arguments, and catching the error in the instance that the input path is wrong or that the file cannot be found in the path.

Could someone please give me a hand with this? Here's my code for this part:

public void readFile(String inputFilePath, String outputFilePath) throws IOException{

    StringBuilder sb = new StringBuilder();

    File input = null;

    try{
    input = new File(inputFilePath);
    }
    catch (FileNotFoundException e){
        System.err.println("Input file cannot be found in the provided path");
    }

Upvotes: 1

Views: 2725

Answers (1)

pvpkiran
pvpkiran

Reputation: 27078

Because this line

input = new File(inputFilePath);

doesn't throw FileNotFoundException

If you dig into the code of new File(..) this is what it has 

public File(String pathname) {
     if (pathname == null) {
         throw new NullPointerException();
     }
     this.path = fs.normalize(pathname);
     this.prefixLength = fs.prefixLength(this.path);
}

as you can see this method doesn't throw FileNotFoundException, there is only possibility of NPE.

If you were to extend your code to read the file like this 

new BufferedInputStream(new FileInputStream(input));

then FileNotFoundException makes sense. Try it out.

Upvotes: 3

Related Questions