Online Java Compiler By
JavaTpoint.com
import java.util.*; import java.util.concurrent.*; public class ConcurrentHashMapcontainsKeyExample1 { public static void main(String[] args) { ConcurrentHashMap
map = new ConcurrentHashMap
(); map.put("java", 10); map.put(".net", 15); map.put("python", 20); map.put("c", 25); map.put("c++", 30); System.out.println(" Mappings are: " +map); System.out.println("is java present? :: " + map.containsKey("java")); //check if map contains key javascript } }
Output