======How To Find Duplicate Words In String==========
public class DuplicateWordsInString
{
public static void main(String[] args)
{
String test = "This sentence contains two words, one and two";
Set<String> duplicates = duplicateWords(test);
System.out.println("input : " + test);
System.out.println("output : " + duplicates);
}
/** * Method to find duplicate words in a Sentence or String * @param input String * @return set of duplicate words */
public static Set<String> duplicateWords(String input)
{
if(input == null || input.isEmpty()){
return Collections.emptySet();
}
Set<String> duplicates = new HashSet<>();
String[] words = input.split("\\s+");
Set<String> set = new HashSet<>();
for(String word : words){ if(!set.add(word))
{
duplicates.add(word);
}
}
return duplicates;
}
}
Output : input : This sentence contains two words, one and two
output : [two]
how-to-find-duplicate-words-in-string
