// exceptions/InputFile.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Paying attention to exceptions in constructors

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class InputFile {
    private BufferedReader in;

    public InputFile(String fname) throws Exception {
        try {
            in = new BufferedReader(new FileReader(fname));
            // Other code that might throw exceptions
        } catch (FileNotFoundException e) {
            System.out.println("Could not open " + fname);
            // Wasn't open, so don't close it
            throw e;
        } catch (Exception e) {
            // All other exceptions must close it
            try {
                in.close();
            } catch (IOException e2) {
                System.out.println("in.close() unsuccessful");
            }
            throw e; // Rethrow
        } finally {
            // Don't close it here!!!
        }
    }

    public String getLine() {
        String s;
        try {
            s = in.readLine();
        } catch (IOException e) {
            throw new RuntimeException("readLine() failed");
        }
        return s;
    }

    public void dispose() {
        try {
            in.close();
            System.out.println("dispose() successful");
        } catch (IOException e2) {
            throw new RuntimeException("in.close() failed");
        }
    }
}