Inventory program only reads one line

[ZestyChieftain]

Hello. I have a program that is supposed to read a .txt file, save the data in an array, then print out that data. I have a program that compiles, but when I run it, it does not print the first line of the .txt file, prints the second line, then does not print the third line, but stays in the run and freezes. Here's the .txt file which is named "inventory.txt" ...

Basketball 2 20.00
Baseball 3 5.00
Soccerball 5 20.00

...and the output should be...

Peter's Sport Store Inventory List

Item Units Price Total Price
Basketball 2 20.00 40.00
Baseball 3 5.00 15.00
Soccerball 5 20.00 100.00

Here is the driver program that I've come up with so far:

import java.io.*;
import javax.swing.*;
import java.text.*;
import java.util.StringTokenizer;

public class Inventory {

public static void main(String[] args) throws IOException {
        
       BufferedReader stdin = new BufferedReader(new                   InputStreamReader (System.in));
        final int MAX = 500;
        InventoryItem[] items = new InventoryItem[MAX];
        StringTokenizer tokenizer;
        String line, name, file = "inventory.txt";
        int units, count = 0;
        double price;

        try {
        
            FileReader fr = new FileReader(file);
            
BufferedReader inFile = new BufferedReader(fr);
            
line = inFile.readLine();

            while ((line = inFile.readLine()) != null) {
                tokenizer = new StringTokenizer(line);

                while (tokenizer.hasMoreElements()) {
                    name = tokenizer.nextToken();

     try {
    units = Integer.parseInt(tokenizer.nextToken());
    
    price = Double.parseDouble(tokenizer.nextToken());
    
    items[count++] = new InventoryItem(name, units, price); }
    
    catch (NumberFormatException exception) {
    
    System.out.println("Error in input. Line ignored:");
    System.out.println(line);
}
    line = inFile.readLine();
}
}
    inFile.close();
    for (int scan = 0; scan < count; scan++)
    System.out.println(items[scan]);
    } 
    
    catch (FileNotFoundException exception){
    System.out.println("The file " + file + " was not found.");
} 
    
     catch (IOException exception){
            
     System.out.println(exception);
}
        stdin.read();
}
}

I'm really confused as to why the program only reads the second line, then refuses to loop and read the third one. Thanks for any help!

[rajujrk]

Hi,

I have just modified your code by commented some lines, there is no big changes


Inventory.java

import java.io.*;
import javax.swing.*;
import java.text.*;
import java.util.StringTokenizer;

public class Inventory {

	public static void main(String[] args) throws IOException {

		BufferedReader stdin = new BufferedReader(new InputStreamReader(
				System.in));
		final int MAX = 500;
		InventoryItem[] items = new InventoryItem[MAX];
		StringTokenizer tokenizer;
		String line, name, file = "C:\\Raju_Work\\inventory.txt";
		int units, count = 0;
		double price;

		try {

			FileReader fr = new FileReader(new File(file));

			BufferedReader inFile = new BufferedReader(fr);

			//line = inFile.readLine();

			while ((line = inFile.readLine()) != null) {
				tokenizer = new StringTokenizer(line);

				
				while (tokenizer.hasMoreElements()) {
					name = tokenizer.nextToken();

					try {
						units = Integer.parseInt(tokenizer.nextToken());

						price = Double.parseDouble(tokenizer.nextToken());

						items[count++] = new InventoryItem(name, units, price);
						
					}

					catch (NumberFormatException exception) {

						System.out.println("Error in input. Line ignored:");
						System.out.println(line);
					}
					//line = inFile.readLine();
				}
			}
			inFile.close();
			for (int scan = 0; scan < count; scan++)
				System.out.println(items[scan]);
		}

		catch (FileNotFoundException exception) {
			System.out.println("The file " + file + " was not found.");
		}

		catch (IOException exception) {

			System.out.println(exception);
		}
		stdin.read();
	}
}

And InventoryItem.j ava

public class InventoryItem {

	private String name;
	private int unit;
	private Double price;
	
	private Double total;

	public InventoryItem(String name, int unit, Double price) {
		// TODO Auto-generated constructor stub

		this.name = name;
		this.unit = unit;
		this.price = price;
		
		this.total = price * unit;
	}
	
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		String strRetval = name + " " + unit + " " + price + " " + total;
		return strRetval;
	}

}

OUT PUT FOrmat:

Basketball 2 20.0 40.0
Baseball 3 5.0 15.0
Soccerball 5 20.0 100.0

Thanks
Rajkumar

[chaarmann]

for every iteration, code in line 26 and also code in line 44 both read a line. So you always read 2 lines per iteration, but do not do anything with the second line.
Just remove line 44 and the code runs a sexpected.