readWriteExample.java

import java.io.*;
import java.util.Scanner;

public class Main
{
    public static void writeFile()
    {
        PrintWriter out = null;
        try
        {
            out = new PrintWriter("writeFile.txt");
            out.println("Line 1\nLine 2\nLine 3");
        }
        catch (FileNotFoundException fne)
        {
            System.out.println(fne.getMessage());
        }
        finally
        {
            if (out != null)
            {
                out.close();
            }
        }
    }

    public static void readFile()
    {
        File fileToRead = new File("readFile.txt");
        Scanner readScanner = null;
        try
        {
            readScanner = new Scanner(fileToRead);
            while (readScanner.hasNextLine())
            {
                String newLine = readScanner.nextLine();
                System.out.println(newLine);
            }
        }
        catch (FileNotFoundException fne)
        {
            System.out.println(fne.getMessage());
        }
        finally
        {
            if (readScanner != null)
            {
                readScanner.close();
            }
        }

    }

    public static void main(String[] args)
    {
        writeFile();
        readFile();
    }
}