Chapter 3Classes and Objects
Both the engineer and the artist must be intimately familiar with the materials of their trade. Oils versus watercolors, steel versus aluminum, bolts versus nails, object versus classes—each of these materials serves similar functions (e.g., bolts and nails are both fasteners), yet each has its own specific properties and uses. The architect may not know the most efficient way to drive a nail (that is a specific skill of the carpenter), but the architect must understand when it is appropriate to use nails or bolts or glue or welds. To ignore such fundamental considerations can yield disastrous results.
When we use object-oriented methods to analyze or design a complex software system, our basic building blocks are ...
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