Category Archives: Java

LinkedHashMap class is Hash table and Linked list implementation of the Map interface, with predictable iteration order. It inherits HashMap class and implements…

The java.util.Map interface represents a mapping between keys and their values. A map cannot contain duplicate keys; and each key can map to…

What are differences between List and Set collection at the top level and How to choose when to use List in java and…

Section 26.1: Initialization A Set is a Collection that cannot contain duplicate elements. It models the mathematical set abstraction. Set have its implementation…

A list is an ordered collection of values. In Java, lists are part of the Java Collections Framework. Lists implement the java.util.List interface,…

The collections framework in java.util provides a number of generic classes for sets of data with functionality that can't be provided by regular…

Parameter                                                                            Details ArrayType Type of the array. This can be primitive (int, long, byte) or Objects (String, MyObject, etc). index               Index refers to the…

Section 22.1: Checking, setting, clearing, and toggling individual bits. Using long as bit mask Assuming we want to modify bit n of an…

Section 21.1: NumberFormat Different countries have different number formats and considering this we can have different formats using Locale of java. Using locale…

Method                                                               Output LocalTime.of(13,  12,  11)                           13:12:11 LocalTime.MIDNIGHT                                        00:00 LocalTime.NOON                                                 12:00 LocalTime.now()                                                  Current time from system clock LocalTime.MAX                                                   The maximum supported local time 23:59:59.999999999 LocalTime.MIN                                                    The…