Top 5 Types of Data Structures in Java

A collection of several data items can be referred to as a data structure. The use of data structures in Java allows for the efficient storage, retrieval, and utilisation of data and information in computer systems. As a result, employing the right data structure can significantly improve an application’s performance. 

In this article, you will learn the top five data structures in Java that you should learn with the help of the best Java Dsa Course in Hyderabad.

What are the types of Data Structures in Java?

1. Primitive Data Structures

These are fundamental data structures that are primarily utilised in fundamental operations. The data structures included in this category are floating, integers, numbers, characters, pointers, and strings.

2. Non-Primitive Data Structures

(i) These are intelligent data structures that carry out complex data-related tasks. 

(ii) There are two main subcategories of non-primitive data structures: linear and non-linear data structures. Linear data structures include queues, stacks, linked lists, and arrays, while non-linear data structures include trees and graphs.

3. Linked Lists

A linked list is a collection of objects called nodes that keeps a list in memory. This data structure is dynamic, meaning that it has a variable size. Each node that is available in a linked list contains a pointer to the node that is immediately adjacent to it. Additionally, Linked lists have a head node and a tail node. 

– Advantages of Linked Lists

(i) Easy insertion and deletion as one link manipulation is required

(ii) Dynamic in size

(iii) Efficient memory allocation

(iv) No wastage as capacity and size are always equal

4. Stack

Stack is a dynamic data structure were adding new elements and removing existing ones are only permitted at one end. It adheres to the Last in First Out Principle (LIFO). The stack is regarded as an Abstract Type of Data (ADT) because it can be implemented in the majority of programming languages.

– Advantages of stack

(i) All operations are of O(1) complexity

(ii) The last element is readily available for use

(iii) Maintains data in a LIFO manner

5. Array

Following are some features of an array–

(i) An array is a collection of elements that are all the same type. 

(ii) Arrays are static data structures with predetermined sizes. 

(iii) A component of an array is referred to as its element. 

(iv) Any legitimate data type that is supported by the java programming language may be included in an array. 

(v) Though each element in the array has a unique index that may be used to store or collect its value, all of the elements are identified by the same variable name.

– Advantages of array

(i) Easy sorting and iteration

(ii) Random access

(iii) Replacement of multiple variables


We hope you learned something from this article, and it made you understand that it is important for you to learn about data structures from any of the best Java Dsa courses in Mumbai.