Thread: Array & file

Hi guys,

I have create the following program and I am little stuck here.
Here is the code:

import java.io.*;
import java.util.StringTokenizer;
 
class ProductNameQuan{
public static void main(String[] args)
{
String fileName = "stockhouse.txt";
StringTokenizer line;
String ProdName;
String quantity;
 
try {
BufferedReader in = new BufferedReader(new FileReader(fileName));
line = in.readLine();
while (line != null) {
ProdName = line.nextToken();
quantity = line.nextToken();
 
System.out.println(line);
line = in.readLine();
 
}
 
in.close();
} catch (IOException iox)
{
System.out.println("Problem reading " + fileName);
}
}
}

I am trying to find the way to read from the file the first 10 information's through the array (not arraylist)ProdName and the quantity." plus that I stack in the in.readLine(); propably is not compatible with the StringTokenizer.
Now the other problem is that I need the quantity to be an integer instead of string.

The file includes something like that:
Ball 32
tennis 322
fireball 54
..
.
.
.
.
Any ideas?

Please read this topic to learn how to post code correctly and other useful tips for newcomers. Edit your post to fix it, if possible.

Explain better what you want help with. Which of the parts you described have you stuck? Reading the file, storing the desired data in the array, etc.? Are you getting errors or unsatisfactory results? If so, copy the error from exactly as it appears at your end and paste it into your post. If the results are not as expected, copy a sample run and post that with a description of what needs to change.

Let's start with the 1st problem, the specific program gives me the below error:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
Type mismatch: cannot convert from String to StringTokenizer
Type mismatch: cannot convert from String to StringTokenizer

at Main.main(Main.java:14)

The second problem is the quantity, i need to change it to integer instead of string. How can I create the code?

Last question, if I need to read from the file the first 10 line (String, int) and put it in array (not arraylist) how can I do it?

Any help will be nice.

Thanks

Originally Posted by andbin

line is a String ... not a StringTokenizer.

while (line != null) {
    StringTokenizer tokenizer = new StringTokenizer(line);
    ProdName = tokenizer.nextToken();
    quantity = tokenizer.nextToken();

The following give me the error:
Type mismatch: cannot convert from String to StringTokenizer
The constructor StringTokenizer(StringTokenizer) is undefined
Type mismatch: cannot convert from String to StringTokenizer

at Main.main(Main.java:14)

Many thank I really appreciate it.

--- Update ---

[highlight=java]

import java.io.*;
import java.util.StringTokenizer;

class Main {
public static void main(String[] args) {
String fileName = "myfile.txt";
String line;
//String ProdName;
//String quantity;

try {
BufferedReader in = new BufferedReader(new FileReader(fileName));
line = in.readLine();
while (line != null) {
StringTokenizer tokenizer = new StringTokenizer(line);
//ProdName = tokenizer.nextToken();
//quantity = tokenizer.nextToken();


System.out.println(line);
line = in.readLine();

}

in.close();
} catch (IOException iox) {
System.out.println("Problem reading " + fileName);
}
}
}
[/highlight=java]

Even I take out the prodname & quantity the program still works which mean is useless.

--- Update ---

How can I make them to work?

the size of the array is 10 products and 10 numbers

I love you