CODEWITHSUNDEEP
java
edward
edward

Reputation: 99

Trying to Continue the program when it returns file not found exception in java

I i am able to read the lines from csv and download the images from url when the url is not having the image it is showing file not found exception in middle of the program i want to continue the program with out terminating.

public static void main(String[] args) throws IOException {
    InputStream inputStream = null;
    OutputStream outputStream = null;
    try {
        BufferedReader br = new BufferedReader(new FileReader("D:\\imgdwnld\\file.csv"));
        String line = br.readLine(); 
        while ((line = br.readLine()) !=null){
            URL url = new URL(line);
            inputStream = url.openStream();
            outputStream = new FileOutputStream("D:\\imgdwnld\\" +
                line.substring(line.lastIndexOf("/")));
            byte[] buffer = new byte[2048];
            int length;
            while ((length = inputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, length);
            }
        }
    } catch (MalformedURLException e) {
        System.out.println("MalformedURLException :- " + e.getMessage());
    } catch (FileNotFoundException e) {
        System.out.println("FileNotFoundException :- " + e.getMessage());
    } catch (IOException e) {
        System.out.println("IOException :- " + e.getMessage());
    } finally {
        try {
            inputStream.close();
            outputStream.close();
        } catch (IOException e) {
            System.out.println("Finally IOException :- " + e.getMessage());
        }
    }
}

Upvotes: 0

Views: 531

Answers (2)

ferjani
ferjani

Reputation: 99

You need to remove the "return" instruction from the corresponding catch (or maybe from the whole code). In your case, the instruction allows to "exit" the main method so the rest of instruction (those after the return statement) won't be executed. Another tip is to separate this instructions in blocs. For example, if reading the CSV and the Img are not bound, you may need to encapsulate each treatment in an individual try-catch block. When parsing/reading the CSV file fails, your code may continue fetching the image.

Upvotes: 0

Marko Topolnik
Marko Topolnik

Reputation: 200296

This is the relevant outline of your code:

try {
  ...
  while ((line = br.readLine()) !=null) {
      ... process each CSV line ...
  }
} catch (IOException e) {
  ... handle it ...
}

At the place where you catch the exception you have already broken out of the main loop. Change the code to have this outline:

while ((line = br.readLine()) !=null) {
  try {
    ... process one CSV line ...
  } catch (IOException e) {
    ... handle it, the loop will proceed with the next line
  }
}

Upvotes: 2

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