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There are several different types of lists that are commonly used in Java. Amongst these are Arraylists, LinkedLists, and Vectors. Unlike arrays, these list methods are dynamically sizable which makes them extremely convenient to use. Also, only one data type can be stored per array and lists can store multiple data in one list. Arraylists and Vectors are not suitable for storing primitive data types and instead must store all data as an object (TUI, n.d.). The biggest differences between these three methods are how they store and access elements. These differences make them better and less suited for storing data in specific scenarios. For instance, if you will be adding a lot of elements but not doing a lot of searching then a LinkedList may be your best bet. If you can predict scalability of data but still need a dynamically sizable array that is searchable, then a Vector might be the most useful. If memory usage is not paramount but you want a high amount of search speed, then an ArrayList is an easy choice. To provide a clearer picture of the differences, here are some examples of the code of each method.
A linked list is a type of list which in the context of programming means that it is linear collection of elements whose order is determined by the elements around it (Linked List, 2021). In linked lists, these elements are known as “nodes†which each node pointing to the next element in the set with a “head†node at the start of the list and a “tail†or null node to end the list. Vectors are synchronized, can increment 100% of its size is adding an element exceeds capacity and can use both enumerator and an iterator (Parahar, 2019). Like ArrayLists, they also keep insertion order. Because memory increase is done in increment, this means that they are more resource friendly than ArrayLists. Because they are synchronized, only one thread can access a Vector at one time. Ultimately, these make Vectors more memory friendly but slower than ArrayLists, but still capable of better search functions than a LinkedLists.