Array Vs Collections in Java

 Java offers two types of constructs where you can store multiple  objects of the same type: Arrays and Collections. They have following differences and features .

• Array  fixed sized and Collections is dynamic sized (Collections automatically expand in size when needed)
• Due to  above reason  Collections are preferred over Arrays with respect to memory.
• Array can contain both primitive data types as well as objects of a class depending on the definition of the array. However, Collections only supports object entries, not the primitive data types
• With respect to performance its better to use arrays but with respect to performance collection are not good to use.
  

References Used :-  array-vs-arraylist-in-java 
Version               :-  1.0.0