For this code, I want to simulate a slot machine and put the username and scores of the games onto a text file titled scores.txt so that if the user selects option 2 they can view their scores.
However, I receive many errors on my FileWriter statement (line is towards the end and marked with a comment), particulary one that I don't understand called unmappable character for encoding CP1252. From everywhere I have checked, I see this error when someone uses a different character like a Japanese character- so why would an error like this come about? I've looked at examples of code but I have not yet learned stream, try and catch, or buffer.
Using filewriter and printwriter can someone explain to me how to create a filewriter object and pass it to a printwriter object correctly, as well as how to correctly read data from that file (scores.txt). Thanks so much in advance, and sorry if this is a simple error.
Specific area of problem:
File file = new File(“scores.txt”); //illegal start of expression
if (!file.exists())
{
file.createNewFile();
}
Scanner inputFile = new Scanner(file);
String line = inputReader.nextLine();
FileWriter fwriter = new FileWriter(“scores.txt”, true); //this is where the error CP1252,
PrintWriter outputWriter = new PrintWriter(file);
outputFile.println(username);
outputFile.println(userFinalTotal);
}
else if (option == 2)
{
if (file.exists())
{
while (inputFile.hasNext())
{
username = inputFile.nextLine();
System.out.println ("Name\n------\n" + name + "\n");
userFinaltotal = inputFile.nextDouble();
System.out.printf("Scores\n------\n$%.2f\n", userFinalTotal);
System.out.println();
inputReader.close();
}
Here is the full program to see where the variables come from.
import java.util.Scanner;
import java.util.Random;
import java.io.*;
public class SlotsMachine
{
public static void main(String[] args) throws IOException
{
int number;
System.out.println ("Welcome to the Slot Machine Simulator!");
System.out.println ("\nActions\n1. Start a new game\n2. Scores\n3. Exit");
System.out.print ("\nPlease select an action: ");
Scanner keyboard = new Scanner(System.in);
int option = keyboard.nextInt();
while (option != 1 && option != 2 && option != 3)
{
System.out.print ("\nThat is not an option. Please select an item number between 1-3: ");
option = keyboard.nextInt();
break;
}
if (option == 1)
{
String username;
double startingTotal = 100.0;
double userTotal = startingTotal;
System.out.print ("\nBefore the game begins, please enter your name: ");
username = keyboard.next( );
System.out.print ("\nGame start! You will begin with $100.00. Enter a negative value to quit the game. Good luck, " + username + "!");
do
{
double bet = keyboard.nextDouble();
bet = 0.0;
userTotal = startingTotal - bet;
System.out.print ("You currently have: " + startingTotal + "\nHow much would you like to bet?");
double winnings = 0.0;
double userFinalTotal = 0.0;
if ((bet < 0) || (userFinalTotal <= 0))
{
break;
}
while (bet > userFinalTotal)
{
System.out.print("\nYour bet is greater than your current total. Please enter a valid amount: ");
bet = keyboard.nextDouble();
}
Random generator = new Random();
int slot1 = generator.nextInt(6);
keyboard.nextLine();
int slot2 = generator.nextInt(6);
int slot3 = generator.nextInt(6);
String firstSlot = "";
switch (slot1)
{
case 0:
firstSlot = "Cherries";
break;
case 1:
firstSlot = "Oranges";
break;
case 2:
firstSlot = "Plums";
break;
case 3:
firstSlot = "Bells";
break;
case 4:
firstSlot = "Melons";
break;
case 5:
firstSlot = "Bars";
break;
}
String secondSlot = "";
switch (slot2)
{
case 0:
secondSlot = "Cherries";
break;
case 1:
secondSlot = "Oranges";
break;
case 2:
secondSlot = "Plums";
break;
case 3:
secondSlot = "Bells";
break;
case 4:
secondSlot = "Melons";
break;
case 5:
secondSlot = "Bars";
break;
}
String thirdSlot = "";
switch (slot3)
{
case 0:
thirdSlot = "Cherries";
break;
case 1:
thirdSlot = "Oranges";
break;
case 2:
thirdSlot = "Plums";
break;
case 3:
thirdSlot = "Bells";
break;
case 4:
thirdSlot = "Melons";
break;
case 5:
thirdSlot = "Bars";
break;
}
System.out.println ("-------------------------------");
System.out.println ("" + firstSlot + " " + secondSlot + " " + thirdSlot);
System.out.print ("-------------------------------");
if (slot1 == slot2 && slot1 == slot3)
{
winnings = bet * 3;
userFinalTotal = userTotal + winnings;
System.out.printf ("\nNumber of matches: 3. You win: $%.2f", winnings);
System.out.printf ("\nYou currently have: $%.2f", userFinalTotal);
}
else if ((slot1 == slot2 && slot2 != slot3) || (slot1 == slot3 && slot1 != slot2) || (slot2 == slot3 && slot3 != slot1))
{
winnings = bet * 2;
userFinalTotal = userTotal + winnings;
System.out.printf ("\nNumber of matches: 2. You win: $%.2f", winnings);
System.out.printf ("\nYou currently have: $%.2fn", userFinalTotal);
}
else
{
System.out.printf ("\nNumber of matches: 0. You win: $%.2f", winnings);
System.out.printf ("\nYou currently have: $%.2f", userFinalTotal);
}
} while (userTotal > 0);
File file = new File(“scores.txt”); //illegal start of expression
if (!file.exists())
{
file.createNewFile();
}
Scanner inputFile = new Scanner(file);
String line = inputReader.nextLine();
FileWriter fwriter = new FileWriter(“scores.txt”, true); //this is where the error CP1252
PrintWriter outputWriter = new PrintWriter(file);
outputFile.println(username);
outputFile.println(userFinalTotal);
}
else if (option == 2)
{
if (file.exists())
{
while (inputFile.hasNext())
{
username = inputFile.nextLine();
System.out.println ("Name\n------\n" + name + "\n");
userFinaltotal = inputFile.nextDouble();
System.out.printf("Scores\n------\n$%.2f\n", userFinalTotal);
System.out.println();
inputReader.close();
}
}
else
{
System.out.println("There are no scores to display at this time.");
}
System.out.println("Actions:");
System.out.print("1. Start a new game\n2. View scores\n3. Exit ");
System.out.println("Please select an action: ");
option = keyboard.nextInt();
}
else if (number == 3)
{
System.out.print ("\nGoodbye!");
System.exit(0);
}
}
}
It compiles now, the only problem is that it prints the scores multiple times.
import java.util.Scanner; import java.util.Random; import java.io.*;
}