The array is a specified-length data structure whereas ArrayList is a variable-length Collection class. Array and ArrayList are important terms in Java and include many differences. In this article, we will discuss some major differences between Array and ArrayList.
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What is an Array?
In Computer Science, an array is a group of the same data types having contiguous memory locations. Array in java is an object that includes elements of a sole data type.
What is an Arraylist?
An ArrayList class in Java is known as a resizable array. Unlink Array, ArrayList can change the length after being created.
Difference between Array and Arraylist in Java
| S.No. | Array | Arraylist |
|---|---|---|
| 1. | Here we can’t revise the length of the array once constructed. | In ArrayList, we can revise the length of the array. |
| 2. | An array can hold primitives and objects both in Java. | ArrayList can only hold objects, not primitives. |
| 3. | It can either be single-dimensional or multidimensional. | It can be only single-dimensional |
| 4. | Through the length keyword, we can determine the total size of an array. | Through the size() method, we can determine the size of an ArrayList. |
| 5. | Array is static. | ArrayList is dynamic and can be modified the size whenever needed. |
| 6. | It is faster than ArrayList due to its static behaviour. | It is slower as compared to the Array due to its dynamic behaviour. |
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