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Asked: 2021-03-21T20:44:08+05:30 In:

Which of the following is a valid syntax to synchronize the HashMap?

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Which of the following is a valid syntax to synchronize the HashMap?
java

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    1. Explainer

      Map m = hashMap.synchronizeMap(); HashMap map =hashMap.synchronizeMap(); Map m1 = Collections.synchronizedMap(hashMap); Map m2 = Collection.synchronizeMap(hashMap);   Answer: (c) Map m1 = Collections.synchronizedMap(hashMap); Explanation: By default, the HashMap class is a non-synchronized collRead more

      1. Map m = hashMap.synchronizeMap();
      2. HashMap map =hashMap.synchronizeMap();
      3. Map m1 = Collections.synchronizedMap(hashMap);
      4. Map m2 = Collection.synchronizeMap(hashMap);

       

      Answer: (c) Map m1 = Collections.synchronizedMap(hashMap);

      Explanation: By default, the HashMap class is a non-synchronized collection class. The need for synchronization is to perform thread-safe operations on the class. To synchronize the HashMap class explicitly, we should use the Collections.synchronizedMap(hashMap) method that returns a thread-safe map object.

      Hence, the correct answer is option (c).

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