There are several built-in data structures in Java that you can use to store and organize data in your programs. These data structures include:
- Arrays: An array is a fixed-size collection of elements of the same type. Arrays are useful when you know how many items you will have in advance and do not need to change the size of the collection after it is created.
- Lists: A list is a collection of items that can be added to or removed from dynamically. Lists are implemented using interfaces, and there are several concrete implementations of lists in the Java collections framework, such as ArrayList and LinkedList.
- Sets: A set is a collection of unique items. Sets do not allow duplicate elements and are implemented using interfaces, with concrete implementations such as HashSet and TreeSet.
- Maps: A map is a collection of key-value pairs, where each key is unique. Maps are implemented using interfaces, with concrete implementations such as HashMap and TreeMap.
- Queues: A queue is a data structure that allows you to add elements to one end (the tail) and remove them from the other end (the head). Queues are useful for implementing first-in, first-out (FIFO) data structures.
- Stacks: A stack is a data structure that allows you to add elements to one end (the top) and remove them from the same end. Stacks are useful for implementing last-in, first-out (LIFO) data structures.
- Trees: A tree is a hierarchical data structure where each node has one or more child nodes. Trees are useful for storing and organizing data that has a hierarchical structure, such as file systems or family trees.
These are some of the most commonly used data structures in Java. You can use these data structures to store and organize data in your programs in a variety of ways, depending on your needs.
In the next Few Weeks I will be covering all of the Data Structures in Java so hang in there and lets have some fun.
