Reading a text file

[xmra]

Hi, i'm doing an assigment in java. I have a text file, the format is the following:

Massachusettes: 016,017,018,019,020,021,022,023,024,025,026,027,05 5
Rhode Island: 028,029
New Hampshire: 030,031,032,033,034,035,036,037,038
Maine: 039,040,041,042,043,044,045,046,047,048,049
Vermont: 050,051,052,053,054,056,057,058,059
Connecticut: 060,061,062,063,064,065,066,067,068,069

I have to store this data in an array. My idea is used a 2D-array. I'm having problems with the StringTokenizer. I have never used StringTokenizer for 2D arrays.

Also, i have another problem, since the number of columns in the array don't have a determined size. I don't know how to set the size.

Once I stored the data into the 2D-array, i need to compare a number given by the user with the numbers stored in the array. If a number match with some number in the array I need to print the Name of the State where the number belongs.

Hope, someone can help or give more ideas!! Thanks!


I have the following:

public class readTest{
// Main method
public static void main (String args[]){
// Stream to read file
FileInputStream fin;

String zipRange [][];
zipRange = new String[4][6];

try
{
// Open an input stream
fin = new FileInputStream ("test.txt");

String line = new DataInputStream(fin).readLine();
StringTokenizer st = new StringTokenizer (line,":");
int n = 0;
int m = 0;
while (line != null){

String state = st.nextToken();
zipRange [n][m] = state;
n++;
while (st.hasMoreTokens()){
StringTokenizer st2 = new StringTokenizer (line, ",");
String range = st2.nextToken();
zipRange [n+1][m] = range;
m++;
n++;

}

}


// Close our input stream
fin.close();
}
// Catches any error conditions
catch (IOException e)
{
System.err.println ("Unable to read from file");
System.exit(-1);
}
}
}

[r035198x]

Hi, i'm doing an assigment in java. I have a text file, the format is the following:

Massachusettes: 016,017,018,019,020,021,022,023,024,025,026,027,05 5
Rhode Island: 028,029
New Hampshire: 030,031,032,033,034,035,036,037,038
Maine: 039,040,041,042,043,044,045,046,047,048,049
Vermont: 050,051,052,053,054,056,057,058,059
Connecticut: 060,061,062,063,064,065,066,067,068,069

I have to store this data in an array. My idea is used a 2D-array. I'm having problems with the StringTokenizer. I have never used StringTokenizer for 2D arrays.

Also, i have another problem, since the number of columns in the array don't have a determined size. I don't know how to set the size.

Once I stored the data into the 2D-array, i need to compare a number given by the user with the numbers stored in the array. If a number match with some number in the array I need to print the Name of the State where the number belongs.

Hope, someone can help or give more ideas!! Thanks!


I have the following:

public class readTest{
// Main method
public static void main (String args[]){
// Stream to read file
FileInputStream fin;

String zipRange [][];
zipRange = new String[4][6];

try
{
// Open an input stream
fin = new FileInputStream ("test.txt");

String line = new DataInputStream(fin).readLine();
StringTokenizer st = new StringTokenizer (line,":");
int n = 0;
int m = 0;
while (line != null){

String state = st.nextToken();
zipRange [n][m] = state;
n++;
while (st.hasMoreTokens()){
StringTokenizer st2 = new StringTokenizer (line, ",");
String range = st2.nextToken();
zipRange [n+1][m] = range;
m++;
n++;

}

}


// Close our input stream
fin.close();
}
// Catches any error conditions
catch (IOException e)
{
System.err.println ("Unable to read from file");
System.exit(-1);
}
}
}

1.) Please use code tags when posting code
2.) Please chose a title that describes your problem
3.) Do not use tokenizer, use the String.split method.
4.) Do not use DataInputStream for reading a text file, use FileReader or Scanner
5.) Is it an assignment requirement that you use an array? You could use ArrayList (dynamic) or better still
HashMap<String, <ArrayList<String>>


Edit: I've renamed the thread.