Obtaining Information from a file

[hannahs]

am trying to write a program which gets a segment of text from a file and tells how many times particular words appeared in the text. The file where the text comes from is set up like this:

A common application
in many areas of data processing
involves searching the contents of a file
for occurrences
of a particular word.
end_of_data
processing
of
word
end_of_data

The first text before the "end_of_data" is the text that is to be searched. The text that is after the "end_of_data" and before the next end_of_data are the words that you are looking for in the text.

Like in this example, the program I am writing would return something like this:

processing appears in line(s) 2 a total of 1 time(s)
of appears in line(s) 2, 3, 5 a total of 3 time(s)
word appears in line(s) 5 a total of 1 time(s)

I have the first part of the text kept in an ArrayList using a loop like this:


public static void main(String[] args) throws IOException
{
ArrayList strList = new ArrayList();
Fill(strList);
System.out.println(strList);


}

public static void Fill(ArrayList list) throws IOException
{
Scanner input = new Scanner(new File("data.txt"));
String text = input.nextLine();
String end = "end_of_data";


while(text.compareTo(end)!= 0)
{
list.add(text);
text = input.nextLine();
}

}




How should I go about getting the search words out of the file? Like in this example I just want the words processing, of, and word. I've been trying to figure out some kind of loop to get them out but I can't seem to come up with anything.

Also, how should I store these words so that I can use them later to search the text?

Thanks in advance. :)

[r035198x]

am trying to write a program which gets a segment of text from a file and tells how many times particular words appeared in the text. The file where the text comes from is set up like this:

A common application
in many areas of data processing
involves searching the contents of a file
for occurrences
of a particular word.
end_of_data
processing
of
word
end_of_data

The first text before the "end_of_data" is the text that is to be searched. The text that is after the "end_of_data" and before the next end_of_data are the words that you are looking for in the text.

Like in this example, the program I am writing would return something like this:

processing appears in line(s) 2 a total of 1 time(s)
of appears in line(s) 2, 3, 5 a total of 3 time(s)
word appears in line(s) 5 a total of 1 time(s)

I have the first part of the text kept in an ArrayList using a loop like this:


public static void main(String[] args) throws IOException
{
ArrayList strList = new ArrayList();
Fill(strList);
System.out.println(strList);


}

public static void Fill(ArrayList list) throws IOException
{
Scanner input = new Scanner(new File("data.txt"));
String text = input.nextLine();
String end = "end_of_data";


while(text.compareTo(end)!= 0)
{
list.add(text);
text = input.nextLine();
}

}




How should I go about getting the search words out of the file? Like in this example I just want the words processing, of, and word. I've been trying to figure out some kind of loop to get them out but I can't seem to come up with anything.

Also, how should I store these words so that I can use them later to search the text?

Thanks in advance. :)

Since you now have the words in an arraylist you should now be looking at the methods available in the arraylist to see how you can count the frequencies. You may also want to take a look at regular expressions.