package example8_3_FileOpening;

import java.io.FileWriter;
import java.io.IOException;

public class EditingFiles {

    public static void main(String[] args) {
        new EditingFiles().example();
    }

    public void example() {
        // How we created the files.
//        for(int i=0; i<10; i++) {
//            writeFile(i);
//        }

        // How we read and write the files.
        for(int i=0; i<10; i++) {
            // TODO: Implement editing by reading and writing files.
        }
    }

    /**
     * Write a file with index fileIndex.
     *
     * E.g., write C:\temp\closeMe\file5.txt for
     *  file index 5.
     *
     * @param fileIndex the index of the file to be written.
     */
    public void writeFile(int fileIndex) {
        String filename = "C:\\temp\\closeMe\\file"+fileIndex+".txt";

        FileWriter writer;
        try {
            writer = new FileWriter(filename);
        } catch (IOException e) {
            System.err.println("Could not open file for writing: "+filename);
            writer = null;
        }

        if(null != writer) {
            System.out.println("Great! We have a file for index "+fileIndex+".");
            try {
                writer.write(""+fileIndex);
                writer.flush();
            } catch (IOException e) {
                System.err.println("Warning: Could not write bytes to file:"+filename);
            }
        }
    }
}