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import java.util.*; public class CollectionsSynchronizedMapExample2 { public static void main(String[] args) { Map
map = new HashMap<>(); map.put(1, 1001); map.put(2, 1002); map.put(3, 1003); map.put(4, 1004); map.put(5, 1005); System.out.println("Map before Synchronized map: " + map); Map
synmap = Collections.synchronizedMap(map); map.remove(4, 1004); System.out.println("Synchronized map after remove(4, 1004):" + synmap); } }
Output