arrays and array list in java смотреть онлайн

arrays and array list in java
ArrayList
ArrayList is dynamic in size. It can be resized itself when needed.
ArrayList is a variable length Collection class.
We cannot store primitive type in ArrayList. It automatically converts primitive type to object.
resize() operation: Automatic resize will slow down the performance as it will use temporary array to copy elements from the old array to new array.(by 50%) add() or get() operation: almost same performance, as for ArrayList object these operations run in constant time.

Array
Array is static in size.
Array is a fixed length data structure
An array can store both objects and primitives type.
It performs fast in comparison to ArrayList because of fixed size.

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