35) What do you mean by entry. What are the differences between HashMap and LinkedHashMap? 223) Difference between HashMap and Hashtable? 3647. 43. What are the differences between HashMap and Hashtable? However, there are many differences between Comparable and Comparator interfaces that are given below. 3466. The third significant difference between HashMap vs Hashtable is that Iterator in the HashMap is a fail-fast iterator while the enumerator for the Hashtable is not. Iterator in hashmap and hashtable is fail fast but enumerator in hashtable isfail safe. 47. 34) What is the purpose of Map interface? By Sonu Kumar Ray Page 1 Q:Difference between HashMap and HashTable? 654. What are differences between Comparable and Comparator? What are the differences between HashMap and Hashtable? Lets note down the differences: All the methods of Vector is synchronized. We have already discussed other popular java interview questions like ArrayList vs Vector and Comparator vs Comparable.This question is generally asked in java intereview to check whether candidate understand correct usage of collection classes and has knowledge of alternative solutions. 41. 225) Difference between Comparator and Comparable in java? What is difference between HashSet and TreeSet? 21) Difference between Vector and ArrayList? 44. Explain about LinkedHashMap? Explain about HashMap? 224) Difference between arraylist and linkedlist? 4241. Several new Collection classes are added in Java 5 and Java 6 specially concurrent alternatives of standard synchronized ArrayList, HashTable and synchronized HashMap … 45. Hashmap is traversed using an iterator, hashtable can be traversed by enumerator or iterator. Example. Difference between HashMap and Hashtable is one of the most popular java interview questions. 39) What is the difference between HashTable and Properties file key=value pairs? 43. 46. HashMap permits null values and only one null key, while Hashtable doesn't allow key or value as null. How do I efficiently iterate over each entry in a Java Map? 47. Explain about HashMap? What is difference between HashSet and TreeSet? . How do I read / convert an InputStream into a String in Java? A: The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls. The default size of HashMap is 16 (0 to 15). 41. What are the differences between HashMap and LinkedHashMap? 37) What is the difference between comparable vs Comparator interface? (HashMap allows null values as key and value whereas Hashtable doesnt allow). We use put() method to insert the Key and Value pair in the HashMap. Comparable and Comparator both are interfaces and can be used to sort collection elements. But, the methods of ArrayList is not synchronized. What are differences between Comparable and Comparator? 46. What is Entry interface? 36) What is the difference between HashMap & LinkedHashMap? 40. In the following example, we want to insert three (Key, Value) pair in the HashMap. 44. ... durga sir ameerpet Harikrishna Sir Ameerpet JAVA IN HINDI Java Introduction Object oriented Programming In Hindi Popular Posts Identifiers Of Java In HINDI Language - NIMAJAVA. 45. Difference between Comparable and Comparator. Explain about LinkedHashMap? 38) What is the difference between TreeSet andTtreeMap? 40. How do I generate random integers within a specific range in Java? What are the differences between a HashMap and a Hashtable in Java? What is Entry interface? 42. 42. Insert Key, Value pair in HashMap. 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