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copied!<p>Just an approach (there are many ways to do this I think): split your <code>String</code> in a <code>String[]</code> and process each word as you need:</p> <pre><code>String str = "Find me a christian male 28 years old from Brazil"; for(String s : str.split(" ")){ //splits your String using space char processWord(s); } </code></pre> <p>Where <code>processWord(s)</code> should do something to determine if <code>s</code> is or not a key word based on your business rules.</p> <p><strong>EDIT:</strong> Well, as many people consider this answer insufficient I'll add some more tips.</p> <p>Let's say you have a class in which you put some search criteria (assuming you want to get people that match these criteria):</p> <pre><code>public class SearchCriteria { public void setGender(String gender){...} public void setCountry(String country){...} public void setReligion(String religion){...} ... public void setWatheverYouThinkIsImportant(String str){...} } </code></pre> <p>As @Sotirios pointed in his comment, you may need a pool of matching words. Let's say you can use <code>List<String></code> with basic matching words:</p> <pre><code>List<String> gender = Arrays.asList(new String[]{"MALE","FEMALE","BOY","GIRL"...}); List<String> country = Arrays.asList(new String[]{"ALGERIA","ARGENTINA","AUSTRIA"...}); List<String> religion = Arrays.asList(new String[]{"CHRISTIAN","JEWISH","MUSLIM"...}); </code></pre> <p>Now I'll modify <code>processWord(s)</code> a little (assuming this method has access to lists above):</p> <pre><code>public void processWord(String word, SearchCriteria sc){ if(gender.contains(word.toUpperCase()){ sc.setGender(word.toUpperCase()); return; } if(country.contains(word.toUpperCase()){ sc.setCountry(word.toUpperCase()); return; } if(religion.contains(word.toUpperCase()){ sc.setReligion(word.toUpperCase()); return; } .... } </code></pre> <p>Finally you need to process user's input:</p> <pre><code>String usersInput = "Find me a christian girl 28 years old from Brazil"; //sorry I change "male" for "girl" but I like girls :P SearchCriteria sc = new SearchCriteria(); for(String word : usersInput.split(" "){ processWord(word, sc); } // do something with your SearchCriteria object </code></pre> <p>Sure you can do this so much better. This is only an approach. If you want to do the search more accurate take a read about Levenshtein's distance. It will help you for example if somebody puts "Brasil" instead "Brazil" or "cristian" instead "christian".</p>

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