I have a question on how to store data from a file into separate arrays. In my case, I need to read a file and store the data into separate arrays, one for the name of the hurricane, the wind speed, the pressure, and the year. Below is my code that I have so far:
import java.util.Scanner;
import java.io.File;
import java.io.IOException;
public class Hurricanes2 {
public static void main(String args[]) throws IOException{
// create token1
String token1 = "";
// create Scanner inFile
Scanner inFile = new Scanner(new File("/Users/timothylee/hurcdata2.txt"));
// while statment
while(inFile.hasNext()){
// initialize token1
token1 = inFile.next();
}
// close inFile
inFile.close();
}
}
and my file contains this:
1980 Aug 945 100 Allen
1983 Aug 962 100 Alicia
1984 Sep 949 100 Diana
1985 Jul 1002 65 Bob
1985 Aug 987 80 Danny
1985 Sep 959 100 Elena
1985 Sep 942 90 Gloria
Any help will be greatly appreciated.
have you heard of regular expressions? Using a tokens array, two string arrays and the regular expression \\s+ you can parse the input.
I would have something like
String tokens[];
String input;
String date[10] = new String[10];
String hurricaneName[10] = new String[10];
int count = 0;
String temp;
// while statment
input = inFile.hasNext()
while(input != null){
tokens = input.split("\\s+");
// the above line splits the input up at every white space
// use this to put appropriate data into proper arrays for example
temp = tokens[0] + tokens[1];
date[count] = temp;
hurricaneName[count] = tokens[5];
count ++;
token1 = inFile.next();
}
I would say
String temp = "";
List yearList = new ArrayList();
List pressureList = new ArrayList();
List speedList = new ArrayList();
List nameList = new ArrayList();
while (temp = inFile.nextLine())
{
String[] stemp = temp.split(" ");
yearList.add(stemp[0]);
//skipping the month
pressureList.add(stemp[2]);
speedList.add(stemp[3]);
nameList.add(stemp[4]);
}
Now the indices for each ArrayList correspond to one another and can easily be iterated through in a for loop.
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