Difference between Array and ArrayList in Java

In Java, Arrays and ArrayLists are both used to store multiple elements, but there are some differences between them:

• 1. Declaration: Arrays are fixed in size and their length needs to be declared when they are created. ArrayLists, on the other hand, can dynamically resize based on the number of elements they contain.
• 2. Type: Arrays can store primitive data types as well as objects, while ArrayLists can only store objects.
• 3. Methods: Arrays are basic data structures with limited methods for manipulation. ArrayLists are classes that come with a variety of methods for adding, removing, and manipulating elements.
• 4. Type Safety: Arrays are not type-safe, meaning you can store any type of object in an array. ArrayLists are type-safe and will generate a compile-time error if you try to add an object of a different type.

Overall, Arrays are more efficient in terms of memory usage and access time, but ArrayLists are more flexible and easier to work with in Java programming.