Great ideas in computer science with Java by Alan W. Biermann, Dietolf Ramm

By Alan W. Biermann, Dietolf Ramm

This publication provides the "great principles" of computing device technology, condensing a large number of complicated fabric right into a practicable, obtainable shape; it does so utilizing the Java programming language. The booklet relies at the problem-oriented method that has been such a success in conventional quantitative sciences. for instance, the reader learns approximately database platforms through coding one in Java, approximately process structure via interpreting and writing courses in meeting language, approximately compilation by way of hand-compiling Java statements into meeting language, and approximately noncomputability through learning an explanation of noncomputability and studying to categorise difficulties as both computable or noncomputable. The booklet covers an surprisingly wide variety of fabric at a shockingly deep point. it is usually chapters on networking and defense. Even the reader who pursues computing device technological know-how no additional will collect an realizing of the conceptual constitution of computing and knowledge know-how that each well-informed citizen must have

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Extra resources for Great ideas in computer science with Java

Sample text

Verb(data) syntax appears everywhere in Java programs, so you should become comfortable with it. It means do to object what verb says, using data. Returning to the organ example, suppose there are two declared organs, or1 and or2. Suppose the method PlayNote needs one piece of data, the note to be played. PlayNote("F"); This sequence will play three sequential notes on the ®rst organ or1, one note on or2, and then a last note on or1. Note that the verb must be appropriate for (de®ned for) the object being addressed.

The method we use to read information into the program is called, appropriately, getText. It captures, or gets, the text that a user of the program types into a particular TextField rectangle on the screen. More speci®cally, the user who is executing the program must use the mouse to place the cursor somewhere into the TextField rectangle and click the left side of the mouse. Then the keyboard is used to type in the text. This text is then available for retrieval with an appropriate getText statement.

This is the ®le that is executed by the browser from your HTML page. We study compilation in detail in chapter 9. 1 here, but later versions of Java should be compatible. However, if your browser processes only earlier versions of Java, the code shown here may not work. In order to properly face up to the issue of versions (or ``dialects'') and compilers, you may have to get some help in adapting to your speci®c situation. Computer science, like many disciplines, has an oral tradition, and some of the most important facts are passed on only by word of mouth.

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