If this code gets invoked often, we should speed it up using various techniques like lazy initialization or double-checked locking (be aware that this might not work as expected due to compiler optimizations).
in org.dom4j.util.SingletonStrategy Best Java code snippets using org.dom4j.util.SingletonStrategy.setSingletonClassName (Showing top 10 results out of 315) origin: org.dom4j/dom4j DocumentFactory.createSingleton() private static SingletonStrategy<DocumentFactory> createSingleton() { SingletonStrategy<Do...
learn java. But for someone a bit experienced who will understand what is happening and need a bit more speed, the second implementation is definitely the way to go. Moreover, most of the time when doing multi-threading, it is a good thing to reduce the size of the synchronized code. ...
The general form of a singleton in C++ can therefore be given as follows (Alexandrescu, 2001): class Singleton { public: static Singleton &GetInstance(); private: Singleton(); ~Singleton(); Singleton(const Singleton &); const Singleton &operator =(const Singleton &); }; Then user code can...
使用python实现设计模式中的单例模式。单例模式是一种比较常用的设计模式，其实现和使用场景判定都是相对...
string pooland we don’t want to lock a string that might be getting used by another piece of code. So I am using an Object variable. Learn more about synchronization andthread safety in java.
In Java: Aa=A.getInstance();Ab=A.getInstance(); a should equal to b. Challenge If we call getInstance concurrently, can you make sure your code could run correctly? classSolution {/***@return: The same instance of this class every time ...
In Java: Aa=A.getInstance();Ab=A.getInstance(); a should equal to b. 1classSolution {2/**3*@return: The same instance of this class every time4*/5privatestaticSolution instance;67privateSolution(){8}9publicstaticsynchronizedSolution getInstance() {10//write your code here11if(instance =...
import java.util.*; class Singleton { private static Singleton instance; private Vector v; private boolean inUse; private Singleton() { v = new Vector(); v.addElement(new Object()); inUse = true; } public static Singleton getInstance() ...
对于MyActivity，singletonInstance不是静态的，即使在SingletonClass中引用相同的对象/实例并且它被声明为...