In this tutorial, you will learn how to add multiple items to an ArrayList in Java. 1. Add multiple items using adAll() method The addAll()… [Read More]
Difference between Array and ArrayList
In this guide, we will discuss the difference between Array and ArrayList. What is an Array? An array is a collection of elements of similar… [Read More]
Difference between length of Array and size of ArrayList in Java
In this tutorial, you will learn the difference between length of Array and size of ArrayList in Java.. Length of Array: // creating an array… [Read More]
How to make an ArrayList read only in Java
A read only ArrayList means that no modification operations is allowed to be performed on ArrayList. This list cannot be modified by adding, removing or… [Read More]
Deque Interface in Java Collections
Deque is a Queue in which you can add and remove elements from both sides. In the Java Queue tutorial we have seen that the… [Read More]
PriorityQueue Interface in Java Collections
In the last tutorial, we have seen how a Queue serves the requests based on FIFO(First in First out). Now the question is: What if… [Read More]
Queue Interface in Java Collections
A Queue is designed in such a way so that the elements added to it are placed at the end of Queue and removed from… [Read More]
Comparator Interface in Java
In the last tutorial, we have seen how to sort objects of a custom class using Comparable interface. By using Comparable we can sort the… [Read More]
Comparable Interface in Java with example
Comparable interface is mainly used to sort the arrays (or lists) of custom objects. Lists (and arrays) of objects that implement Comparable interface can be… [Read More]
Java – How to Sort a HashSet?
As we know HashSet doesn’t sort elements, in fact it displays them in random order. While dealing with HashSet we may come across a situation… [Read More]
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