synchronized method

Multi-thread programming learning 2 (concurrent access to objects and variables) and multi-thread programming VariablesI. ConceptsNon-thread security:When multiple threads concurrently access instance variables in the same object, the result is

Java-related Basics2. Is string the most basic data type?The basic data types are byte, int, char, long, float, double, Boolean, and short.The Java.lang.String class is of the final type, so you cannot inherit the class or modify the class. In order

I. Synchronized keywordsSynchronization methodEach object contains a lock (also called a monitor), which is automatically referred to as part of the object (you do not have to write any special code for this). When any synchronized method is called,

The communication between Java multithreadingOutline of this articleI. Several states of a threadTwo. Inter-threading interactionsThree. Example code AnalysisI. Several states of a threadThreads have four states, and any one thread must be in one of

I. the synchronized keyword has two scopes:1. is an object instance, synchronized aMethod () {} can prevent multiple threads from simultaneously accessing the object's synchronized Method (if an object has multiple synchronized methods, as long as a

Reprint Please specify the Source: http://blog.csdn.net/ns_code/article/details/17225469Wait () Method: Publicfinal void Wait () throws Interruptedexception,illegalmonitorstateexception　　The wait () method causes the current thread to wait until

Static Config * instance =Nil; + (Config *) Instance { @ Synchronized (self ){ If (nil =Instance ){ [Self new]; } } ReturnInstance; } + (Id) allocWithZone :( NSZone *) zone { @ Synchronized (self ){ If (instance =Nil ){ Instance =

The need for inter-thread Signaling  Through synchronization, one thread can safely change values that another thread will read. How does the second thread know that the values have changed? What if the second thread is waiting for the values to

Java Basics1. What are the features of object orientation?1. Abstraction:Abstraction is to ignore those aspects irrelevant to the current target in a topic, so that you can pay more attention to the aspects related to the current target. Abstraction

Synchronized is a keyword of the Java language. When it is used to modify a method or a code block, it can ensure that at most one thread can execute the code segment at the same time. The synchronized keyword, which has two usage methods:

JAVA concurrent programming 3 _ synchronized keyword for thread synchronization and synchronized keyword In the previous blog, I explained the JAVA thread memory model. For details, see JAVA concurrent programming 2 _ thread Security & memory model,

Introduction The producer and consumer problems are classic issues in the thread model:Same time periodIntranet sharingSame bucketAs shown in, if the producer stores data into the space and the consumer uses the data, the following situations may

1. Does the array have the length () method? Does string have the length () method? A: The array does not have the length () method. It has the Length attribute. String has the length () method. 2. String S = new string ("XYZ"); how many string

First, let's talk about the differences between final, finally, and finalize.　　Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?　　Third, the

Source code: Class producer extends thread { Private cubbyhole; Private int number; Public producer (cubbyhole C, int number ){ Cubbyhole = C; This. Number = number; } Public void run (){ For (INT I = 0; I Cubbyhole. Put (I ); Try { Sleep (INT)

Cooperation between tasksAs you 've seen, when you use threads to run more than one task at a time, you canKeep one task from interfering with another task's resources by using a lock (mutex) To synchronize the behavior of the two tasks. That is, if

I always asked a question during the interview. What is the difference between vector and arraylist? I have never paid too much attention to this problem before. Therefore, when querying materials, I can see that the explanations for this problem on

one: instanceof keyword in Java(1) Definition: instanceof is a Java two-dollar operator, and ==,>,Its purpose is to test whether the object on its left is an instance of the class to the right of it, returning a Boolean type of data.(2) Example:

Flaws in Java threadingAllen Holub points out that the threading model of the Java programming language may be the weakest part of the language. It is completely unsuitable for the requirements of the actual complex program and is not

---restore content starts---Locking and monitoringAs long as there is an instance there is a relative lock. This is not to say that because the synchronized method of an instance is executing, the synchronized method that prevents other instances