How do you use ConcurrentHashMap with a simple code example?

ConcurrentHashMap is part of the Java Collections Framework and provides a thread-safe implementation of the Map interface. It is particularly useful in concurrent programming where multiple threads need to read and write to a shared map without running into concurrency issues. Unlike the traditional HashMap, ConcurrentHashMap allows for high concurrency and is designed for situations where reads are more frequent than writes.

Here is a simple example of using ConcurrentHashMap:


        import java.util.concurrent.ConcurrentHashMap;

        public class ConcurrentHashMapExample {
            public static void main(String[] args) {
                ConcurrentHashMap map = new ConcurrentHashMap<>();

                // Putting values in the map
                map.put("Apple", 1);
                map.put("Banana", 2);
                map.put("Orange", 3);

                // Accessing values
                System.out.println("Apple count: " + map.get("Apple"));

                // Removing a value
                map.remove("Banana");

                // Iterating over the map
                map.forEach((key, value) -> {
                    System.out.println(key + ": " + value);
                });
            }
        }

How do you use ConcurrentHashMap with a simple code example?

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How do you use ConcurrentHashMap with a simple code example?

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