The genesis of the computer revolution was in a machine.The genesis of our programming languages thus tends tolook like that machine.
But computers are not so much machines as they are mind amplification
tools (“bicycles for the mind,” as Steve Jobs is fond of saying) and a
different kind of expressive medium. As a result, the tools are beginning
to look less like machines and more like parts of our minds, and also like
other forms of expression such as writing, painting, sculpture, animation,
and filmmaking. Object-oriented programming (OOP) is part of this
movement toward using the computer as an expressive medium.
“為什么面向?qū)ο蟮木幊虝?huì)在軟件開發(fā)領(lǐng)域造成如此震憾的影響？”

面向?qū)ο缶幊蹋∣OP）具有多方面的吸引力。對(duì)管理人員，它實(shí)現(xiàn)了更快和更廉價(jià)的開發(fā)與維護(hù)過程。對(duì)分析與設(shè)計(jì)人員，建模處理變得更加簡(jiǎn)單，能生成清晰、易于維護(hù)的設(shè)計(jì)方案。對(duì)程序員，對(duì)象模型顯得如此高雅和淺顯。此外，面向?qū)ο蠊ぞ咭约皫?kù)的巨大威力使編程成為一項(xiàng)更使人愉悅的任務(wù)。每個(gè)人都可從中獲益，至少表面如此。
如果說(shuō)它有缺點(diǎn)，那就是掌握它需付出的代價(jià)。思考對(duì)象的時(shí)候，需要采用形象思維，而不是程序化的思維。與程序化設(shè)計(jì)相比，對(duì)象的設(shè)計(jì)過程更具挑戰(zhàn)性——特別是在嘗試創(chuàng)建可重復(fù)使用（可再生）的對(duì)象時(shí)。過去，那些初涉面向?qū)ο缶幊填I(lǐng)域的人都必須進(jìn)行一項(xiàng)令人痛苦的選擇：