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Editorial Team
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Asked: 2026-06-09T14:28:31+00:00

I was going through abstract factory design pattern below is the UML diagram for

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I was going through abstract factory design pattern below is the UML diagram for that..
enter image description here

please suggest me the best examples for this paatern as I have tried best but I am in search of that example that is easy to learn and want to make my understanding for abstract factory pattern 100% clear.Please advise

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  1. Editorial Team

    Have you looked at DocumentBuilderFactory class that’s built into the JDK? It does exactly this, with it’s target item being a Document object.

    The jdk has the DocumentBuilderFactory class, which uses a service locator strategy to find a a concrete implementation of the DocumentBuilderFactory class (ie. xerces or some other parser). 

    // Uses service locator approach to find an implementor like xerces
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(...);

    java.awt.Toolkit is another great example of this. This time, it uses the JVM implementation itself to provide the instance:

    Toolkit toolkit = Toolkit.getDefaultToolkit();

    The actual concrete class is different based on what OS you’re on, and whether you’re running in headless mode or not.

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