Text files

import java.util.Random;
public class Coin {
    private String sideUp; /*A String named sideUp */
    int coinToss;
    String fileName="myoutput.txt";

    public void toss(){
        Random random = new Random(); /* Creates an instance of a random number*/

        coinToss=random.nextInt(2); /*0 to 1*/

        if (coinToss==1) {sideUp="Heads";
            } /*If the random number is 0, then it sets the sideUp field to "heads".*/
        else if (coinToss==0){sideUp="Tails";
             } /*If the random number is 1, then it sets the sideUp field to "tails".*/
    }

    public Coin(){/* no-argument constructor that calls the toss method*/
        toss();
    }
    public String getSideUp( ) {return sideUp;
    } /* A method named getSideUp that returns the value of the sideUp field*/

    public String showPastRun() {return fileName; /*A method named showPastRun that opens the file named myoutput.txt*/
    }
}

package Coin;

import java.util.Scanner;

import java.io.*;

/* Author: Soren Fuerst
Date 4/8/2020
Assignment: # 5
Instructor: Sergio Pisano*/



public class Driver {
    public static void main(String[] args) throws IOException{
        int NumFacingHeads=0;
        int NumFacingTails=0;
        int totalToss=20;
        String answer;

        Coin thisCoin=new Coin(); /* Creates a new instance of the class "Coin"*/
        var in=new Scanner(System.in);


        PrintWriter outputFile = new PrintWriter(); /*reads data from the file and displays it*/


        outputFile.close();

        System.out.println("Does the past run need to be displayed ?");
        answer=in.next();

        if (answer.equals("no")) {System.out.println("Okay");}
        else if (answer.equals("yes")) {System.out.println("The first line in the file is:" + thisCoin.showPastRun() );}




        System.out.println("New Coin-Toss Simulator Run:");

        System.out.println("The initial side facing up is " + thisCoin.getSideUp()); /* Displays side that is initially facing up*/
        for (int myToss=0; myToss<20; myToss++) { /* The loops 20 times*/
            thisCoin.toss(); /* calls on the method "toss" to toss the coin*/
            if (thisCoin.getSideUp()=="Heads") {NumFacingHeads= NumFacingHeads +1; /* Keeps count of the number of Heads and the number of Tails*/
            }
            else if (thisCoin.getSideUp()=="Tails") {NumFacingTails= NumFacingTails +1;
            }
            System.out.println("Toss " + myToss + ":" + thisCoin.getSideUp()); /* displays the current side each time it is tossed*/

        }

        System.out.println("After " + totalToss+ " tosses, the number of Heads tossed is " + NumFacingHeads + " and the number of Tails tossed is " + NumFacingTails +".");


        FileOutputStream fos=new FileOutputStream(thisCoin.showPastRun());  /*stores data from output in the myoutput.txt*/
        PrintStream ps= new PrintStream(fos);
        System.setOut(ps);


    }


}