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Category: Collection Framework

What is a Collection class in Java?

What is a Collection class in Java?

What is a Collection class in Java? Collections class defines several utility methods for collection objects like sorting, searching, reversing, etc.  Sorting elements of List  Collections class defines the following two methods for sorting. 1 Public static void sort(List l) To sort based on default natural sorting order In this . . . Read more

What is IdentityHashMap?

What is IdentityHashMap?

What is IdentityHashMap? In journal == operator meant for reference comparison (address comparison) and equals() method meant for content comparison. It is exactly same as HashMap(including methods and constructors) except the following difference. In the case of normal HashMap, JVM will use .equals() method to identify duplicates keys, which is meant for content . . . Read more