Online Java Compiler By
JavaTpoint.com
import java.util.*; import java.util.concurrent.*; public class ConcurrentHashMapKeysExample1 { public static void main(String[] args) { ConcurrentHashMap
conmap = new ConcurrentHashMap
(); conmap.put(10, "Java"); conmap.put(11, ".net"); conmap.put(20, "php"); conmap.put(12, "C"); conmap.put(30, "C++"); // print statement System.out.println(" Map : " + conmap); Enumeration enumr = conmap.keys(); System.out.println(" enumeration of keys are:"); while (enumr.hasMoreElements()) { System.out.println(enumr.nextElement()); } } }
Output