Question

I have a ArrayList, with elements something like:

[string,has,was,hctam,gnirts,saw,match,sah]

I would like to delete the ones which are repeating itself, such as string and gnirts, and delete the other(gnirts). How do I go about achieving something as above?

Edit: I would like to rephrase the question:

Given an arrayList of strings, how does one go about deleting elements containing reversed strings?
Given the following input:

[string,has,was,hctam,gnirts,saw,match,sah]

How does one reach the following output:

[string,has,was,match]

Answer 1

Set<String> result = new HashSet<String>();
for(String word: words) {
    if(result.contains(word) || result.contains(new StringBuffer(word).reverse().toString())) {
        continue;
    }
    result.add(word);
}
// result