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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