Java- Issue with opening and Scanning file

Question

I am writing a program in Java, it scans a file, counts lines, character, palindromes, words. My problem is when I ask for a filename, I am using BufferedReader and InputStreamReader to scan the file the user provided, and print the results in another file, my program compiles, when I type in the name of the file nothing happens, program does not finish, and remains stuck, here is code the BufferedReader, if the entire code is needed i will post it up

System.out.println("Enter the name of the file you would like to scan: ");
                        String fileName = scan.nextLine();

                        File file = new File(fileName);



          BufferedReader br = new BufferedReader(newInputStreamReader(System.in));

You´re reading from System.in ... so you´re reading not from file but from System input. — cljk, Dec 01 '13 at 20:42

score 1 · Answer 1 · edited May 23 '17 at 12:12

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Try with

BufferedReader br = new BufferedReader(new FileReader(fileName));

actually you are specifying your reader InputStreamReader to read from System as System.in though you are trying to read a file. So you have to use FileReader. See How to read file in Java

also thanks to @user1009560 you can use

BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));

edited May 23 '17 at 12:12

Community

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answered Dec 01 '13 at 20:36

Anirban Nag 'tintinmj'

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BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file))); – user1009569 Dec 01 '13 at 20:41
I tried this i am getting: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown BufferedReader br = new BufferedReader(new FileReader(fileName)); – octain Dec 01 '13 at 21:06
`FileNotFoundException` is a [checked exception](http://stackoverflow.com/questions/3747155/why-am-i-getting-must-be-caught-or-declared-to-be-thrown-on-my-program). – Anirban Nag 'tintinmj' Dec 01 '13 at 21:08
I handled this, but when I compile it is saying cannot find symbols for filename. what should be in the try block? i have this: try{System.out.println("Enter the name of the file you would like to scan: "); String fileName = scan.nextLine(); File file = new File(fileName); BufferedReader br = new BufferedReader(new FileReader(fileName)); } – octain Dec 01 '13 at 21:14
Ask a different question. There is no meaning of answering your query in comments. This is not a forum. – Anirban Nag 'tintinmj' Dec 01 '13 at 21:15

score 1 · Answer 2 · answered Dec 01 '13 at 20:42

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    Scanner scanner = new Scanner(System.in);
    String fileName = scanner.next();
    scanner.nextLine();

    FileReader file = new FileReader(fileName);

    BufferedReader br = new BufferedReader(FileReader);

answered Dec 01 '13 at 20:42

openmike

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score 0 · Answer 3 · answered Dec 01 '13 at 20:35

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You're creating an InputStreamReader object as System.in as the inputStream property. You'll need to specify a FileInputStream for as the InputStream.

answered Dec 01 '13 at 20:35

user1009569

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Java- Issue with opening and Scanning file

3 Answers3