Reading a file line and storing variables of different types

Question

I am trying to figure out a way to read from the following text file. I am able to get the first integer in the text file which is numLines. After that point, I am able to get the first integer from the line, but am unable to successfully get each individual group of letters.

for(int i=0; i < numLines; i++){
   numVariables = Integer.parseInt(fin.next());

    for(int z=0; z < numVariables; z++){
        String line = fin.next();

        int numRules = Integer.parseInt(line.substring(0, 1));

        //Everything up until this point is good

        //read and store first capital letter of every line
        String variable = line.substring(2,3);

        //read and store remaining capital letters that correspond to every line separately
    }
}

Text File

3
2 A CC DD
3 A AA z v
2 F f a

Answer 1

I didn't see what is the problem. If you say you have problem of "parsing", you could try:

• read a line ( String line )

• split it into two parts. check here: http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#split(java.lang.String , int)

array =line.split(" ", 2)

then

array[0] is the leading number
array[1] is the rest letters

if you want each part, you could split (" ") without limit.

if you just want to get those Uppercase words, you can do it by regex:

line.split(" ",2); //array[0] is the leading number

apply "(?<= )[AZ]+(?= )" on array[1], you get all Upper case words.

is that what you want?

Answer 2

String[] words = line.split(("\\s+"); // Any whitespace
int numRules = Integer.parseInt(words[0]);
for (int j = 1; j < words.length; ++j) {
   String variable = words[j];
}