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Mulitple entries-Java

Posted on 2007-11-25
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198 Views
Last Modified: 2013-11-23
I can't get this code to allow the user to enter more than one entry after hitting yes.

How do I do this?
// Week5.java
 
import java.util.*;
import java.io.*;
 
// class Week5 definition
public class Week5
{
	// method main
	public static void main(String args[])
	{
		System.out.println("This program will create a shopping list:");
 
		// call the inputItems method
		inputItems();
		// call the outputItems method
		outputItems();
 
		System.exit(0);
	}
 
	// method inputItems
	public static void inputItems()
	{
		Scanner keyboard = new Scanner(System.in);	// create a keyboard Scanner
		PrintWriter outFile = null;					// declare a PrintWriter
		String response;
 
 
		try
		{
			outFile = new PrintWriter(new FileOutputStream("shoppinglist.txt"));
			// get first item from user
			System.out.print("Please enter your first item: ");
			outFile.write(keyboard.nextLine() + "\n");
 
 
 
			System.out.print("Do you wish to enter more Items? Yes/No: ");
			response = keyboard.nextLine();
 
			while( response.toUpperCase().equals("Yes") )
			{
				// get next item from user
				System.out.print("Enter your next item: ");
				outFile.write( keyboard.nextLine() + "\n" );
				System.out.print("Do you wish to enter more Items? Yes/No: ");
				response = keyboard.nextLine();
			}
			outFile.close();					// close the file
		}
		catch(FileNotFoundException e)		// catch exception
		{
			// display the error message and exit program
			System.err.println("File write error occurred.");
			System.exit(0);
		}
 
 
 
	}
 
	// method outputItems
	public static void outputItems()
	{
		try
		{
			// create a Scanner for the input file
			Scanner inFile = new Scanner( new File("shoppinglist.txt"));
 
			System.out.println("Your shopping list contains: ");
 
			while( inFile.hasNextLine() )
 
				System.out.println( inFile.nextLine() );
 
			inFile.close();			// close the file
		}
		catch(IOException io)		// catch exception
		{
			// display the error message and exit program
			System.err.println("File read error occurred.");
			System.exit(0);
		}
 
	}
}

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Question by:Talulia
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5 Comments
 
LVL 92

Accepted Solution

by:
objects earned 250 total points
ID: 20347228
>                         while( response.toUpperCase().equals("Yes") )

change to:

                        while( response.equalsIgnoreCase("yes") )
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Author Comment

by:Talulia
ID: 20347263
I've corrected that part.

How do I get the textfile to read the items inputted like this:

Ham
Cheese
Sausage

instead of like this:

HamCheeseSausage

I know I need to use the StringTokenizer class but not sure how to use it. "I think", anyways.
// Week5.java
 
import java.util.*;
import java.io.*;
 
// class Week5 definition
public class Week5
{
	// method main
	public static void main(String args[])
	{
		System.out.println("This program will create a shopping list:\n");
 
		// call the inputItems method
		inputItems();
		// call the outputItems method
		outputItems();
 
		System.exit(0);
	}
 
	// method inputItems
	public static void inputItems()
	{
		Scanner keyboard = new Scanner(System.in);	// create a keyboard Scanner
		PrintWriter outFile = null;					// declare a PrintWriter
		String response;
		String newentry;
 
 
		try
		{
			outFile = new PrintWriter(new FileOutputStream("shoppinglist.txt"));
			// get first item from user
			System.out.print("Please enter your first item: ");
			outFile.write(keyboard.nextLine() + "\n");
 
 
 
			System.out.print("Do you wish to enter more Items? Yes/No: ");
			response = keyboard.nextLine();
 
			while( response.equalsIgnoreCase("yes"))
			{
				// get next item from user
				System.out.print("Enter your next item: ");
				outFile.write( keyboard.nextLine() + "\n" );
 
				System.out.print("Do you wish to enter more Items? Yes/No: ");
				response = keyboard.nextLine();
			}
			outFile.close();					// close the file
		}
		catch(FileNotFoundException e)		// catch exception
		{
			// display the error message and exit program
			System.err.println("File write error occurred.");
			System.exit(0);
		}
 
 
 
	}
 
	// method outputItems
	public static void outputItems()
	{
		try
		{
		// Scanner for the input file
			Scanner inFile = new Scanner( new File("shoppinglist.txt"));
 
			System.out.println("\nYour shopping list contains:\n ");
 
			while( inFile.hasNextLine() )
 
				System.out.println( inFile.nextLine() );
 
			inFile.close();			// close the file
		}
		catch(IOException io)		// catch exception
		{
			// display the error message and exit program
			System.err.println("File read error occurred.");
			System.exit(0);
		}
 
	}
}

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0
 
LVL 17

Assisted Solution

by:contactkarthi
contactkarthi earned 250 total points
ID: 20347319
your code is fine

if you open with a wordpad you can see as you expect.. if you want to see them in notepad also use System.getProperty("line.separator") instead of "\n"

two lines in you code should look like

outFile.write(keyboard.nextLine() + System.getProperty("line.separator"));
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