编写Java的(单例模式)单实例Singleton 的示例

代码分享如下：

public class SimpleSingleton {       private static SimpleSingleton singleInstance =  new SimpleSingleton();          //Marking default constructor private       //to avoid direct instantiation.       private SimpleSingleton() {       }          //Get instance for class SimpleSingleton       public static SimpleSingleton getInstance() {              return singleInstance;       }   }  /**另一种实现*/public enum SimpleSingleton {       INSTANCE;       public void doSomething() {       }   }      //Call the method from Singleton:   SimpleSingleton.INSTANCE.doSomething();  

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