import java.util.concurrent.ConcurrentHashMap;
class Main {
public static void main(String[] args) {
ConcurrentHashMap<String, Integer> numbers = new ConcurrentHashMap<>();
numbers.put("One", 1);
numbers.put("Two", 2);
numbers.put("Three", 3);
System.out.println("ConcurrentHashMap: " + numbers);
// Using search()
int sum = numbers.reduce(4, (k, v) -> v, (v1, v2) -> v1 + v2);
System.out.println("Sum of all values: " + sum);
}
}