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ConcurrentHashMap in Java 8
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ConcurrentHashMap<String, MyClass> m =
new ConcurrentHashMap<String, MyClass>(8, 0.9f, 1);

public void mergeValue_jdk8(String word, int occurrence) {
wordMap.merge(word, occurrence, (key, value) -> wordMap.getOrDefault(key, 0) + value);
}

ConcurrentHashMap<String, Integer> wordMap = new ConcurrentHashMap<String, Integer>(16, 0.9f, 1);
wordMap.merge(word, occurrence, (key, value) -> wordMap.getOrDefault(key, 0) + value);
wordMap.reduceValues(1,(count1,count2) -> count1+count2);


Java8 has lots of new features that will help in writing code that express its intent more clearly and in concise way. ConcurrentHashMap has lots of nice features that reduces boiler plate code, most of the new features are ...

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