java spring framework interview questions

. At the same time if there are multiple threads accessing Hashmap,collections.synchronizedmap () can be substituted, generally hashmap more flexible.10. Why is the vector considered to be obsolete or unofficially deprecated? Or why we should always use ArrayList instead of vectors.You should use ArrayList instead of vectors because by default you are non-synchronous, vectors synchronize each method, you almost never do that, and usually you want to synchronize the entire sequence of operations.

(); - } - - Public BooleanIsEmpty () {///Bottom call is LinkedList's IsEmpty () method to determine if the set internal data is empty - returnlink.isempty (); in } -}(2) test of Mystack:1 Packagecn.itcast_05;2 3 /*4 * Test of Mystack5 */6 Public classMystackdemo {7 Public Static voidMain (string[] args) {8 //To create a collection object9Mystack ms =NewMystack ();Ten One //adding elements AMs.add ("Hello"); -Ms.add ("World"); -Ms.add ("

Summary of Java back-end development interview questions of major companies, and java back-end interview questions ThreadLocal (thread variable copy) Synchronized implements Memory sharing. ThreadLocal maintains a local variable

reviews.③ (Recruiting for an insurance project) "I don't have much experience with spring MVC, so there are some unanswered questions, mostly developed using the JSP+SERVLET+JDBC model (this is truth, but if he's prepared before the interview, it shouldn't be said), But I have done insurance-related projects, the customer is XX, to achieve the insurance project

1. How do you understand spring? In particular, spring is a lightweight container for managing business-related objects. The core function is mainly: IOC,AOP,MVC. IOD: Control reversal, the creation of the object to the container, so that the container to manage the life cycle of objects such as creation, initialization, destruction and so on. AOP: Aspect-oriented programming, the focus of the modular, thro

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