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