synchronized method

40. Can Constructor be overwritten? Constructor cannot be inherited, so Overriding cannot be overwritten, but Overloading can be overloaded. 41. Can I inherit the String class?The String class is a final class, so it cannot be inherited. 42. Does

For example, an object is like a big house, and the door is always open. There are many rooms in the house (that is, the method ). These rooms are locked (Synchronized Method) and not locked (normal method ). There is a key at the door of the room,

[. Net (C #)]How to copy an array to arraylist(1) string [] S = {"111", "22222 "};Arraylist list = new arraylist ();List. addrange (s ); (2) string [] S = {"111", "22222 "};Arraylist list = new arraylist (s ); [. Net (C #)]Lists sharing classes and

   I. The problem of using DCL for delayed loading of non-static domains: the compiler will write unordered 1. What is unordered write: Initialize first and then point. The actual situation is that the write point is initiated.When instance = new

First, let's talk about the differences between final, finally, and finalize. Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent class. Therefore, a class

Collection of Mixed Problems in Java First, the difference between final, finally, and finalize. Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent class.

1. Briefly describe the access permissions of private, protected, public, and internal modifiers.A. Private: Private Members can be accessed within the class.Protected: protects members, which can be accessed within the class and in the inheritance

Http://hi.baidu.com/chaletli/item/beb128f39dccd413d7ff8cf5   Note the following when using the synchronized keyword: 1. the synchronized keyword cannot be inherited. Although synchronized can be used to define a method, synchronized is not part of

Java interview questions, java questions1. simple principles and applications of the Exception Handling Mechanism in C ++ or Java. When a JAVA program violates the JAVA Semantic Rules, the JAVA Virtual Machine will indicate an error as an exception.

Understanding of JAVA multi-thread concurrent programming and java multi-thread concurrent programming Understanding of JAVA multi-thread concurrent programming Java multi-thread programming focuses on concurrent access to a single resource. This

When multiple threads run at the same time, the execution sequence cannot be determined. If these threads operate on a public resource at the same time, the final execution result is unpredictable, therefore, some methods should be taken in the code

Black Horse programmer [multithreading in Java], black horse java Multithreading Multithreading in Java First, let's talk about a problem before talking about threads. We know that the principle of Multithreading is that the cpu performs switching

1. Differences between synchronized and static synchronizedSynchronized locks the current instance of the class to prevent other threads from simultaneously accessing all the synchronized blocks of the instance of the class. Note that this is the

Synchronized lock: 1. All the locks obtained by synchronized areObject lock,Instead of locking a piece of code or method. Synchronized locks the instance object of this method. If multiple threads accessSame object The synchronized method can be

The answer is as follows: First, let's talk about the differences between final, finally, and finalize. Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent

From: http://www.afugame.com/club/dispbbs.asp? Boardid = 13 & id = 5236 &Page = 1 & move = nextSynchronized vs syncrootWe know that in some set types of. net, such as hashtable and arraylist, both have the synchronized static method and the syncroot

  First, let's talk about the differences between final, finally, and finalize. Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent class. Therefore, a class

1. You need to implement the ____________ interface or the type of the declared ____________ Method for objects that can be accessed through foreach.A: ienumerable and getenumerator. 2. What is GC? Why does GC exist?A: GC is a garbage collector.

Java interview knowledge points (most of them have been seen, but they are still very useful ~~ Turn to stay) It's a classic thing, and it's everywhere. First, write the original article:First, let's talk about the differences between final,

First, let's talk about the differences between final, finally, and finalize. Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent class. Therefore, a class