In this tutorial you will learn about Java LinkedList class. Linked list is a linear data structure that contains nodes. Node stores data and reference to the next node. Java provides us in built classes and methods for creating and handling of linked list. So using linked list in java so easy. Also Read: Java Singly …
Here you will learn about difference between Hashtable and HashMap in Java. Both Hashtable and HashMap are data-structure based upon hashing and implementation of Map interface, and almost seems to be similar but there is significant difference between both which is described as follows. Characteristic Hashtable HashMap Synchronization Hashtable is synchronized internally. Synchronization means that …
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Here you will learn about Comparable vs Comparator in Java. Difference between Comparable and Comparator is one of the commonly asked questions in Java interviews. Both the interfaces are used to sort collection objects but still there are some differences between them which I have discussed below. Also Read: Comparable and Comparator Example Comparable vs Comparator …
Here you will learn about difference between array and arraylist in java. Both array and arraylist are most important and frequently used data structure in java. Below I have discussed about various differences between them. Difference between Array and ArrayList in Java Property Array ArrayList Size Array is fixed in size. Once declared, its …
In this tutorial you will learn how to sort arraylist of objects in java. In our previous tutorial we have seen how to sort arraylist of String or Integer type using Collection.sort() method. Can we use that process to sort an arraylist of custom objects? The answer is big no. For doing this we have …
Through this blog, I will be sharing how can we make a custom iterator in Java. Iterators can come in handy in many situations. An iterator is basically an object which can help us to go over a collection, it can serve as an alternative to foreach loop. So let’s explore more about custom iterators …
The collection is a framework in java. It contains some of the most used classes which are present in the interfaces. Collection interface mainly has 3 child interfaces and these are as follows. Image Source 1. List It contains an order of all the objects. This interface also helps you to have a dynamic size …
TreeSet is an implementation class of NavigableSet. In a TreeSet, duplicate as well as heterogenous (values of different data types) values are not allowed. If you’re trying to insert heterogeneous objects then it displays a ClassCastException. If the tree set exists, then we can insert a null value, and if the treeset doesn’t exist then …