import net.openhft.collections.SharedHashMap; public class HugeCollectionsExample { public static void main(String[] args) { SharedHashMap<String, Integer> map = new SharedHashMap.Builder() .entries(1000000) .create(); map.put("key1", 1); map.put("key2", 2); int value1 = map.get("key1"); int value2 = map.get("key2"); System.out.println("Value 1: " + value1); System.out.println("Value 2: " + value2); map.close(); } }