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Question: Difference between Arrays and Collection in Java?

ARRAYS COLLECTION
Arrays are fixed in size that is once we create an array we can not increased or decreased based on our requirement. Collection are growable in nature that is based on our requirement. We can increase or decrease of size.
With respect to memory Arrays are not recommended to use. With respect to memory collection are recommended to use.

With respect to performance Arrays are recommended to use. With respect to performance collection are not recommended to use.
Arrays can hold only homogeneous data types elements. Collection can hold both homogeneous and and heterogeneous elements.
There is no underlying data structure for arrays and hence readymade method support is not available. Every collection class is implemented based on some std data structure and hence for every requirement readymade method support is available being a performance. we can use these method directly and We are not responsible to implement these methods.
Arrays can hold both object and primitive. Collection can hold only object types but primitive.