Category: java

What is Set? Will go with the mathematical explanation: A set is a collection of well defined and distinct objects. So HashSet, LinkedHashSet, TreeSet will …

There are different ways to sort the HashMap object based on key. 1: Using ArrayList. 2: Using TreeMap 1: Using ArrayListGet the list of keys …

In this article I will show you how to create and iterate over HashMap, LinkedHashMap, TreeMap object HashMap : HashMap is used to save key, …

Adding the user defined object as key in HashMap is common in real time applications. As you are aware that key in HashMap should be …

Few employee objects are saved in arraylist. Will try to sort these element either by Employee name or Employee salary. I have created 2 java …

In most of the java application we need to create our own class and objects. It may be Employee, Address, Person details etc. In this …

ArrayList is an resizable-array implementation of the List interface. This class uses a dynamic array for storing elements, including null value. In line no.9 I …