A Concise Introduction to Data Structures Using Java by Mark J. Johnson

By Mark J. Johnson

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Designed for a CS2 info constructions direction, this article offers an intensive yet concise assessment of knowledge constructions in addition to a steady advent to Java. It makes use of a concise type and comprises pseudocode and routines all through in order that scholars how to write code, instead of simply learn it. The publication covers the entire major parts taught in CS2 classes, together with arrays, lists, stacks, queues, recursion, maps, and trees. Read more...

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Designed for a CS2 info constructions direction, this article presents an intensive yet concise assessment of information constructions in addition to a steady creation to Java. It makes use of a concise kind and contains pseudocode and routines all through in order that scholars the best way to write code, instead of simply learn it. The ebook covers all the major components taught in CS2 classes, together with arrays, lists, stacks, queues, recursion, maps, and bushes

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However, there still may be times when we need to eliminate references to objects that are no longer being used. In general, if x is a reference to an object we no longer need, then setting x to null will alert the garbage collector that the object can be deleted (assuming no other references point to it). 2). StringBuilder objects are specifically designed to perform efficient string accumulation. Because they are mutable, their contents can change and so they do not require creating new objects for every concatenation.

5. Modify main() to test your functions. (a) subtract(Fraction f1, Fraction f2) to compute f1 - f2 (b) multiply(Fraction f1, Fraction f2) to compute f1 * f2 (c) divide(Fraction f1, Fraction f2) to compute f1 / f2 8. 5 that reduces this fraction to its lowest terms. 1. Add calls to the reduce() function to other methods in the class where they are necessary. 9. Modify the reduce() method from the previous exercise to handle negative fractions correctly. Have the constructor make sure all denominators are positive, so that negative fractions have a negative numerator.

Write expressions to return each of these values: (a) The length of s (b) The third character in s (as in, the third character of “abcd” is “c”) (c) The substring of s consisting of its third through fifth characters (d) The substring of s consisting of its fourth character to the end 6. Suppose s and t are references to Java strings. (a) Write an if-statement that will execute its body only when s and t have the same contents. (b) Write an if-statement that will execute its body only when s and t have different contents.

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