Question

Question 5 In the following method, describe which variables are thread-safe and which are not thread-safe and why. Not yet answered public int wasSoHard (int x, String in, Array List<Integer> stuff) { Marked out of char c in.charAt (x) 3.00 P Flag question for (int i= 0; i < in.length); i if (in.charAt (i) == c) { stuff.add (i); return stuff .size() B

Please help me to answer the 5 programming questions and give some specific explanations, thanks a lot !!!

Answer 1

Solution - In the above method variable stuff is not thread safe where as variable x,in,c is thread safe

Basically in java all the classes defined under  collection not thread-safe (except the Vector and Hashtable) therefore the arraylist stuff is not thread safe.

In java String class is thread safe as all the immutable object in Java are thread safe so the string variable here "String in" is thread safe.