Java - How to progra by Paul J. Deitel

By Paul J. Deitel

Java how you can Program-Pearson-Paul Deitel, Harvey Deitel-2016-EDN-10

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By Paul J. Deitel

Java how you can Program-Pearson-Paul Deitel, Harvey Deitel-2016-EDN-10

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Translator programs called assemblers were developed to convert early assembly-language programs to machine language at computer speeds. The following section of an assembly-language program also adds overtime pay to base pay and stores the result in gross pay: load add store basepay overpay grosspay Although such code is clearer to humans, it’s incomprehensible to computers until translated to machine language. Computer usage increased rapidly with the advent of assembly languages, but programmers still had to use many instructions to accomplish even the simplest tasks.

Avoid reinventing the wheel— use existing pieces wherever possible. This software reuse is a key benefit of object-oriented programming. Messages and Methods Calls When you drive a car, pressing its gas pedal sends a message to the car to perform a task— that is, to go faster. Similarly, you send messages to an object. Each message is implemented as a method call that tells a method of the object to perform its task. For example, a program might call a particular bank account object’s deposit method to increase the account’s balance.

Deitel. The company’s clients include many of the world’s largest companies, government agencies, branches of the military, and academic institutions. , publishes leading-edge programming textbooks, professional books and LiveLessons DVD-based and web-based video courses. com/deitelfan) and Twitter (@deitel). com. Bulk orders by corporations, the government, the military and academic institutions should be placed directly with Pearson. com Before You Begin This section contains information you should review before using this book and instructions to ensure that your computer is set up properly for use with this book.

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