Reading from a file to make an array

[Bomber_Will]

Can someone give me a way that file1:

1 2 3 4 5 6
2 3 4 5 6 7
...etc

would be treated like file2

1
2
3
4
5
6
2
3
4
etc..

I want to do something like list[0][0] = 1, list[0][1] = 2, etc

This piece of code only works for file2:

for(int i = 0; i < 10; i++)
{
            	for(int j = 0; j < 6; j++)
            	{
            		list[i][j] = input.readLine();
            	}
}

I was looking into String Tokenizer but I haven't found any code yet that can help. I'll keep looking though while this topic is open. Thanks

[Eranga]

Ok, tel me what's the way you are going to do this? From where you start?

[Bomber_Will]

I don't know how am I going to do this yet.

I just need a code that will assign 1 on list[0][0], 2 on list[0][1], 3 on list[0][2]...2 on list[1][0], 3 on list list[1][1], etc when the text file is

1 2 3 4 5 6
2 3 4 5 6 7

[Eranga]

First of all you have to read the file line by line. Can you do that, if so how did you do that?

[Bomber_Will]

Yeah I can do that but it reads 1 2 3 4 5 6 as 1 2 3 4 5 6 instead of being 1 alone and then 2 alone

URL site = new URL("http://www.website.com/matrix.txt");
BufferedReader input = new BufferedReader(new InputStreamReader(site.openStream()));

for(int i = 0; i < 10; i++)
{
            	for(int j = 0; j < 6; j++)
            	{
            		list[i][j] = input.readLine();
            	}
}

*website edited out for privacy*

This only works if text file is

1
2
3
4
etc

[angryboy]

why don't u just read file in as string. then use charAt(int index) to print the char's out one by one.

[Eranga]

Yes as angryboy says, read each line as a string. Easy to manipulate. And also if you want you can use a regular expression as well.

[Bomber_Will]

Well this program I'm writing has the user pick a number and then the program go to list[number - 1] and displays everything on that line. Each line contains 6 values that needs to be displayed on different parts of the screen. (Applet with text boxes)

Edit: I'll try to do it that way right now. I'll post in like 5-10 minutes to update you all.

[Eranga]

Once you read it as a string, later it's possible to convert it into any type. Seems you are worrying about that.

[Bomber_Will]

URL site = new URL("http://www.website.com/matrix.txt");
BufferedReader input = new BufferedReader(new InputStreamReader(site.openStream()));
            
            for(int i = 0; i < 10; i++)
            {
            		list[i] = input.readLine();
            }     
           
            for(int i = 0; i < 10; i++)
            {
            	String number = list[i];
            	StringTokenizer st = new StringTokenizer(number);
            	
            	for(int j = 0; j < 6; j++)
            	{
            			stats[i][j] = st.nextToken();
            	}
            }

This seems to work even though I had to use 2 arrays. I can't use charAt(int) since the text file is going to contain double digit numbers, sorry for not mentioning it earlier. Thanks for giving me the idea of treating each line as a string and then breaking it down from there. Eranga, I was more worried about complicating such a simple code, but I guess this will have to do.

[Eranga]

What happen when you run this code?

[Bomber_Will]

lets say you have the file

1 2 3 4 5 6
2 3 4 5 6 7

The first for loop would give

list[0]: 1 2 3 4 5 6
list[1]: 2 3 4 5 6 7

The second for loop would give

stats[0][0]: 1
stats[0][1]: 2
stats[0][2]: 3
stats[0][3]: 4
stats[0][4]: 5
stats[0][5]: 6

stats[1][0]: 2
stats[1][1]: 3
stats[1][2]: 4
stats[1][3]: 5
stats[1][4]: 6
stats[1][5]: 7

Then I have:

String first = stats[choiceInt - 1][0];
String second = stats[choiceInt - 1][1];
String third = stats[choiceInt - 1][2];
String fourth = stats[choiceInt - 1][3];
String fifth = stats[choiceInt - 1][4];
String sixth = stats[choiceInt - 1][5];

Where choiceInt is a number the user picks when the program is ran. After that I have the code:

firstText.setText(first);
secondText.setText(second);
thirdText.setText(third);
fourthText.setText(fourth);
fifthText.setText(fifth);
sixthText.setText(sixth);

Where firstText, secondText, etc send the values to TextField boxes in my applet