How to find the ocuurence of a word from LIST A in LIST B in a text file?

Question

Hey if you look at the text file there is LIST A and LIST B.. i need to find the ocuurence of a word from LIST A in LIST B. Eg: if my output is (1,3)
then first word from LIST A occurs in 3 places in LIST B.
Can you please get the sample code to do this process.
Please let me know..
My text file looks like this below :
phrases.txt
LIST A
aamsz
abaffiliate
aboard casino
above computer
above pop
above violat
LIST B
http://209.153.231.131
HTTP/1.0 200 OK
Server: Microsoft-IIS/5.0
Date: Mon, 02 Feb 2004 11:53:26 GMT
IISExport: This web site was exported using IIS Export v2.2
IISExport: This web site was exported using IIS Export v2.2
Content-Length: 274
Content-Type: text/html
Set-Cookie: ASPSESSIONIDSSDBBBAR=OOGFKOJBMKMDCGPIHPADALHB; path=/
aboard casino
Cache-control: private
abaffiliate
above computer

Answer 1

The key difference is that Vector is synchronized whilst ArrayList is not. Synchronized means that the classes methods can safely be accessed by different threads and as your application will not be multithreaded then the ArrayList is possibly the better option.
To store Strings in an ArrayList, you first need to declare the ArrayList object something like this;
ArrayList<String> listAList = new ArrayList<String>();and you would obviously do something similar for the ArrayList that will hold the Strings that should belong to List B.
The first thing to note is that you can use the new (well new in version 1.5 anyway) generics techniques to specify the type of the object the ArrayList will hold; Strings in this case.
To add a value into the ArrayList once you have read it from the file and decided if it belongs in the List A or List B ArrayList, all you need to do is call the add() method of the ArrayList something like this;
// Assume that you read the line from the file into a variable called temp;
listAList.add(temp);To compare the two lists, the easiest option would be to iterate through one ArrayList and ceheck to see if the values you recover from it are duplicated in the other ArrayList. Luckilly, ArrayList has another method that helps here, it is called contains();
Assuming that you have two ArrayList(s), one called listAList that holds the Strings that belong to List A and another called listBList that holds the Strings that belong to ListB, you could do something like this to check for duplicates;
for(String element : listAList) {
    if(listBList.contains(element)) {
        System.out.println("Found a match");
}Hope that helps.