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2025-01-27 11:58本頁(yè)面
【正文】 not only the data, but also the salesanalysis applet you need to display it. The numbers will pop up on your screen in a Java spreadsheet, so you can noodle around with them immediately rather than hassle with importing them to your own spreadsheet program。re not just talking word processors and spreadsheets here, but also applications to handle sales, customer service, accounting, databases, and human resourcesthe meat and potatoes of corporate puting. Java is also making possible a controversial new class of cheap machines called work puters， or NCs， which SUN， IBM, Oracle, Apple, and others hope will proliferate in corporations and our homes． The way Java works is simple, Unlike ordinary software applications, which take up megabytes on the hard disk of your PC， Java applications， orapplets， are little programs that reside on the work in centralized servers， the work that delivers them to your machine only when you need them to your machine only when you need them． Because the applets are so much smaller than conventional programs, they don39。s information are too plex,thus the work load are extremely big,the statistics and the inquiry have been ,how to solve these insufficiencies,let the marks management to be more convenient and quickly,have a higher efficiency,and bee a key question. More and more are also urgent along with school automationthe marks management when science and technology rapid development,therefore is essential to develop the software system of marks register to assist the school teaching that can improve the marks management,enhance the efficiency of management. “We cut nature up, anize it into concepts, and ascribe significances as we do, largely because we are parties to an agreement that holds throughout our speech munity and is codified in the patterns of our language ? we cannot talk at all except by subscribing to the anization and classification of data which the agreement decrees.” Benjamin Lee Whorf (18971941) The genesis of the puter revolution was in a machine. The genesis of our programming languages thus tends to look like that machine. But puters 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. Objectoriented programming (OOP) is part of this movement toward using the puter as an expressive medium. This chapter will introduce you to the basic concepts of OOP, including an overview of development methods. This chapter, and this book, assumes that you have some programming experience, although not necessarily in C. If you think you need more preparation in programming before tackling this book, you should work through the Thinking in C multimedia seminar, downloadable from . This chapter is background and supplementary material. Many people do not feel fortable wading into objectoriented programming without understanding the big picture first. Thus, there are many concepts that are introduced here to give you a solid overview of OOP. How
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