a 2D char array from a text file?
How could I make an array of characters be entered from a text file. At the moment it has the numbers and space in a 100*100 grid (map.txt, seperated by enters for each line), although I would like to make a 1000*1000 grid using all the alpha-numeric characters later(maby symbols too).
But anyway I have this:
//in init:
try{
BufferedReader mapReader =new BufferedReader(new FileReader("Map.txt"));
}catch (FileNotFoundException exc){
System.out.println("A map file was not found.");
}
//and
board =newchar[boardSize+1][boardSize+1][2];
tempChar =newchar[boardSize*boardSize];
//later I call this to input the board
publicvoid resetBoard(){
mapReader.read(tempChar);
try{
for(i=0;i<10000;i++){
board[(int)Math.floor(i/100)][i-((int)Math.floor(i/100))][0] = tempChar[i];
board[(int)Math.floor(i/100)][i-((int)Math.floor(i/100))][1] = tempChar[i];
}
}catch(ArrayIndexOutOfBoundsException exc){ ;}
}
Any ideas on how I can make this actually read the file, it does NOT give me the "a map file was not found error, and it gives me a
E:\Java\DungeonFighter\DungeonFighter.java:335: cannot resolve symbol
symbol : variable mapReader
location: class DungeonFighter
mapReader.read(tempChar);
^
error
Thanks Zeb
PS. It says that I override a deprecated API. I don't really care, but I think that it might be a good thing to know what I am overriding.
[2569 byte] By [
Zebediah] at [2007-9-30 21:46:24]
Something like the following should work:
int[][][] values = new int[100][100][2];
FileInputStream fileIn = new FileInputStream("map.txt");
BufferedReader reader = new BufferedReader(new InputStreamReader(fileIn));
for (int rowCurrent = 0; rowCurrent < 100; rowCurrent++) {
String line = reader.readLine();
StringTokenizer tokenizer = new StringTokenizer(line, " ");
for (int colCurrent = 0; colCurrent < 100; colCurrent++) {
int currentValue = Integer.parseInt(tokenizer.nextToken());
values[rowCurrent][colCurrent][0] = currentValue;
values[rowCurrent][colCurrent][1] = currentValue;
}
}
- Saish
"My karma ran over your dogma." - Anon
Saish at 2007-7-7 3:15:31 >
Did you know that (in C and the derived languages like C++ and Java) if i is ant int, then /100 is an integer too? Appearently not.
I will try some of those methods, but I was trying for characters, is that possible?also what is that /100 thing? ("if i is an int, /100 is an integer too")?For now, I just assigned spaces to everythink to work on the other methods :) I can move anywhere!
If you want characters (and they are space delimited within your file), then simply remove the Integer.parseInt() code and replace with the following:
tokenizer.nextToken().charAt(0);
If you want to convert integer values to characters (ala Ascii codes), simply use:
(char) Integer.parseInt(tokenizer.nextToken());
- Saish
"My karma ran over your dogma." - Anon
Saish at 2007-7-7 3:15:31 >
Thanks, the type of data that it would be entering would be like this
1111111111
1000011111
1110000111
11A11100G1
1100000111
1101111111
1100000111
1111110D11
11S0000111
1111111111
not actually anything there, just a path, but this is the type of entered thing(also, it should be viewed in monospace font.
> How could I make an array of characters be entered
> from a text file. At the moment it has the numbers
> and space in a 100*100 grid (map.txt, seperated by
> enters for each line), although I would like to make a
> 1000*1000 grid using all the alpha-numeric characters
> later(maby symbols too).
>
> But anyway I have this:
> > //in init:
> try {
> BufferedReader mapReader = new BufferedReader(new
> FileReader("Map.txt"));
> } catch (FileNotFoundException exc) {
> System.out.println("A map file was not found.");
> }
> //and
> board = new char[boardSize+1][boardSize+1][2];
> tempChar = new char[boardSize*boardSize];
>
> //later I call this to input the board
> public void resetBoard() {
> mapReader.read(tempChar);
> try {
> for(i=0;i<10000;i++) {
> board[(int)Math.floor(i/100)][i-((int)Math.floor(i/100)
> ][0] = tempChar[i];
> board[(int)Math.floor(i/100)][i-((int)Math.floor(i/100)
> ][1] = tempChar[i];
> }
> } catch(ArrayIndexOutOfBoundsException exc) { ; }
> }
>
>
> Any ideas on how I can make this actually read the
> file, it does NOT give me the "a map file was not
> found error, and it gives me a
> E:\Java\DungeonFighter\DungeonFighter.java:335: cannot
> resolve symbol
> symbol : variable mapReader
> location: class DungeonFighter
> mapReader.read(tempChar);
> ^
> error
>
> Thanks Zeb
>
> PS. It says that I override a deprecated API. I don't
> really care, but I think that it might be a good thing
> to know what I am overriding.
If you dont declare the object mapReader at class level you cannot see it outside the try/catch block.
Best of luck.- Saish"My karma ran over your dogma." - Anon
Saish at 2007-7-7 3:15:31 >
Thanks, I thaught that it seemed kinda wierd that that would work while *arrays* need to be declared, so in the declarations where i say "int i;" and stuff i say
BufferedReader mapReader;
FileReader mapFileReader;
I also would change the init item appropriatly for it to make sense
interestingly enough, I also have a zoom thing (zoom is the size of a square in pixels) it works fine, i can zoom in and out in 5,10,25, and 50 pxl squares with no problem. when i do the last zoom out(to one) though, it just doesn't like it. (the thread locks up, appletviewer.exe takes between 97 and 99 % of my processing power, and nothing happens... )
Very Interesting........
I have another problem now. The string seems to not be right, as I changed by paint thing to display the character, rather than the color in the correct box. the columns are the same, identical to the first entry in the corresponding row. I do not know why. any clue?
here is the code: public void resetBoard() {
try {
mapFileReader = new FileReader("Map.txt");
mapReader = new BufferedReader(mapFileReader);
mapRead = true;
} catch (FileNotFoundException exc) {
System.out.println("A map file was not found.");
mapRead = false;
}
for (int rowCurrent = 0; rowCurrent < boardSize; rowCurrent++) {
try {
line = mapReader.readLine();
} catch(IOException exc) { ; }
tokenizer = new StringTokenizer(line, "\n\r");
for (int colCurrent = 0; colCurrent < boardSize; colCurrent++) {
try {
char currentValue = tokenizer.nextToken().charAt(colCurrent);
board[rowCurrent][colCurrent][0] = currentValue;
board[rowCurrent][colCurrent][1] = currentValue;
} catch(NoSuchElementException exc) { ; }
}
}
}
if my file is
10000
20000
30000
40000
50000
my output is :
12345
12345
12345
12345
12345
(of course it is a larger thing, but this is the pattern.
Any ideas?
Grrr... I wish there was a edit button.
My computer-teacher-to-be suggested that I can simply use the readLine() method to imput the string to the array, as I want ALL the characters(other then enter) in the array(more characters, more possibilities :).
for(i=0; i<boardSize; i++) {
board[i][][0] = mapReader.readLine();
board[i][][1] = board[i][][0];
}
Maby it'll work :)>
