JAVA Design Patterns for Beginner - Singleton

Usage of singleton Design pattern

This design pattern commonly used for java.default constructor is avoid multiple object creation.

 A static modifier is applied to the instance method that returns the object as it then makes this method a class level method that can be accessed without creating an object.


Default Constructor
 

private static SingletonClass ourInstance = new SingletonClass();
 public static SingletonClass getInstance() 

{
  return singletonObj;
 }
 private SingletonClass() {
 }