Lets find the frequency of words in a sentence
This a quick tutorial for finding the frequency of each word in given string using java. This is a frequently asked question in interviews.
They might ask to write the code in Java or Java 8.
Lets see how to write it in Java 8 way first as Java 8 is trending in current market.
Java 8 way of doing it
String input = "Weather is good for living here";
Map<String, Long> frequencyOfWords = Arrays.stream(input.split(" ")).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));
Not using Java 8
String input = "Weather is good for living here";
Map<String , Integer> frequencyOfWords = new HashMap<>();
for( String word : input.split(" ")){
if( frequencyOfWords.containsKey(word) ){
frequencyOfWords.put(word, frequencyOfWords.get(word) + 1);
} else { frequencyOfWords.put(word, 1);
}
}
Try the above codes and see the result.
Thanks for reading!!!!
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