The document compares ColdFusion (CF) and Java in terms of class and instance creation, emphasizing the blueprint-like nature of .class files and the need for constructors in object-oriented programming. It discusses how to reference Java classes in CF using <cfobject> or createObject(), including examples of implicit and explicit constructor calls. Performance considerations are noted, particularly regarding the cost of object creation and immutability, along with guidance on using external Java libraries within ColdFusion.

1. Leveraging the power under the hood CF and Java

2. Comparison of Runtime Java Write {filename}.java

3. The javac compiler creates {filename}.class ColdFusion Write {filename}.cf(c|m)

4. Server compiles them to {_filename_}.class Java Virtual Machine JVM

5. Instance (object) Classes and Instances .class is like a blueprint. It gives the builder the instructions HOW to build something..all the implementation details.. BUT ..you wouldn’t want to live in a blueprint. For a real house, we have to ‘construct’ the house. Class C:\Documents and Settings\nick.harvey\Local Settings\Temporary Internet Files\Content.IE5\U0BPZ5RV\MPj03995150000[1].jpg

6. 'Class' Methods and Properties That doesn’t mean a class is not useful. We don't always need the real object. How many rooms

7. Square footage and size information

8. A materials list These are called ‘class’ methods and properties

9. In Java, these are referred to in the docs as 'static'

10. 'Instance' Methods and Properties Similarly, there are some things we don’t know about an object until it is created... What color the house is

11. The location of the house

12. The owner’s name These are known as ‘instance’ methods and properties.

13. Classes and Instances in CF We create a reference to a Java class in CF by using <cfobject..> of createObject()

14. <cfset javaMath = createObject(“java”, “java.lang.Math”)>

15. We can now call class methods on this