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Software Engineering
Singleton will work properly in multithreaded environment only if eager instantiation has been done because in this case instance creation will happen at the time of class loading only. But for Lazy instantiation we...
When we serialize an object and deserialize it again there are different hash code values generated as shown in the example below. So our Singleton principle breaks in case of object serialization/deserialization. Output How...
If we try to make instance by cloning it, the generated hash code of cloned copy doesn’t match with the actual object so it also violates the Singleton principle. Example Output How to fix:...
Using reflection we can set the private constructor to become accessible at runtime as shown in the example below. Example Output In above output we are seeing first two objects are assigned same hashcode,...
Sometimes it’s important for some classes to have exactly one instance. There are many objects we only need one instance of them and if we, instantiate more than one, we’ll run into all sorts...
Builder pattern was introduced to solve some of the problems with Factory and Abstract Factory design patterns when the Object contains a lot of attributes. There are three major issues with Factory and Abstract...
The design patterns are language independent strategies for solving common object-oriented design problems. When you make a design, you should know the names of some common solutions. Learning design patterns is good for people...