Answer Posted / dara
Ensure a class has only one instance, and provide a global
point of access to it. Singletons maintain a static
reference to the sole singleton instance and return a
reference to that instance from a static instance() method.
Example:
========
public class MyClassSingleton {
private static MyClassSingleton instance;
//Constructor must be protected or private to perevent
creating new object
protected MyClassSingleton() {
}
//could be synchronized
public static MyClassSingletongetInstance() {
if (instance==null)
instance = new MyClassSingleton()
return instance;
}
public void method1(){
System.out.println("hello singleton");
}
}//end of class
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