Download e-book for iPad: Data Structures and the Java Collections Frameworks by William J. Collins

By William J. Collins

ISBN-10: 0470482672

ISBN-13: 9780470482674

Rather than emphasizing the underlying arithmetic to get programmers to construct their very own facts constructions, Collins permits them to govern current constructions within the Java Collections Library. this enables them to profit via coding instead of by means of doing proofs. 23 lab tasks and hundreds of thousands of programming examples are built-in through the pages to construct their instinct. The technique this e-book takes is helping programmers fast study the options that underlie information buildings.

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Extra resources for Data Structures and the Java Collections Frameworks

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So if a String reference is passed as an argument in a method call, the String object will not be affected by the call. The following program illustrates the immutability of String objects. println (s); } // method run public void flip (String t) { t = new String ("no"); } // method flip } // class Immutable The output will be “yes”. The flip method constructed a new String object, but did not affect the original String object referenced by s. 3 shows the relationship between the argument s and the parameter t at the start of the execution of the call to the flip method.

A user of a class writes code that includes an instance of that class. Someone who simply executes a program that includes an instance of a class is called an end-user. A developer of a class actually creates fields and method definitions. 2, we will look at the developer’s perspective and compare the user’s and developer’s perspectives. Specifically, we create an interface, and utilize it and its implementing classes as vehicles for introducing several object-oriented concepts. 2 An Interface and a Class that Implements the Interface This section is part of an extended example that continues through the rest of the chapter and illustrates several important object-oriented concepts.

This reference is stored in names. In order to specify one of the individual elements in an array, an index is used. An index is an integer expression in square brackets; the value of the expression determines which individual element is being denoted. The smallest allowable index is 0. For example, names [0] = "Cromer"; will store a reference to “Cromer” at the zeroth entry in the array (referenced by) names. The size of an array is fixed once the array has been created, but the size need not be determined at compile-time.

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Data Structures and the Java Collections Frameworks by William J. Collins

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