CODE EXAMPLE FOR JAVA

java-word-count

import java.util.HashMap;
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import java.util.Locale;
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import java.util.Map;
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public class WordCount {
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    public WordCount() {
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    }
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    public Map<String, Integer> phrase(String text) {
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        Map<String, Integer> map = new HashMap<>();
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        String[] textParts = text.toLowerCase()
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                .trim()
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                .replaceAll("[.-_:;?!@^&%$§=]", "")
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                .replaceAll("'([a-zA-Z0-9]+)'", "$1")
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                .replaceAll("^[,s]+","")
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                .split("[,s]+");
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        for (String textPart : textParts) {
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            if (map.containsKey(textPart)) {
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                int counter = map.get(textPart) + 1;
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                map.put(textPart, counter);
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            } else {
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                map.put(textPart, 1);
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            }
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        }
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        return map;
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    }
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}
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