Question: (a) Identify all differences between the HashMap structure and the ArrayList structure. (b) In what circumstances will random numbers generated using the Random class (e.g.,

(a)Identify all differences between the HashMap structure and the ArrayList structure.

(b)In what circumstances will random numbers generated using the Random class (e.g., using the nextInt method) appear to be completely non-random?

(c)What rules must be adhered to when adding comments to a Java program, in order to obtain meaningful javadoc output?

(d)What is the this keyword used for in Java? Describe two situations in which it is necessary to make use of this keyword.

(e)How are static variables and methods created in Java? What happens if a non-static method of a class tries to access a static variable of that class? What happens to the static variables of a class once the class has no instances?

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