Java How To Program (Early Objects)
10th Edition
ISBN: 9780133807943
Author: Deitel, Paul
Publisher: Pearson Education
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Expert Solution & Answer
Chapter 1, Problem 5E
Explanation of Solution
Object
- Depending on whether it is
mechanical or electronic watch, there will be different design for power source location, watch casing, hands and watch protection. - The user check out from watch is position of its hands to read time.
- The rest of watch’s functioning is encapsulated within the casing.
- Before time of a watch is read, it must have been constructed from its engineer’s drawings or design plans.
Attributes
- Apart from the ability to read time, it has attributes such as color, constituent material, power source and extra properties such as water resistant, size, its ability to keep track of date and month.
- The watch’s attributes are representing part of its design in its engineering diagrams.
- Every watch will maintain its own attributes.
Behavior
- For a mechanical watch, the behavior or method hides the hand and wheel movement mechanism from the watch.
- Behavior and method are similar terms.
- Behavior house the same way as watch perform its tasks.
Class
- A class is used to embody a set of methods that aid in performing class’s tasks.
- A class can be seen as blueprints and in the case of watch, the engineering drawings or design plan from which watch class is created.
- It will hence contain methods for reading, changing time and so on.
Inheritance
- With inheritance, a new class can be created from the existing class.
- The new class absorbs the characteristics of the existing class.
- Alarm clock may contain general watch characteristics such as hands and timing parameters but at the same time it may have an extra customized alarm device...
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5. Word FrequencyWrite a program that reads the contents of a text file. The program should create a dictio-nary in which the keys are the individual words found in the file and the values are the number of times each word appears. For example, if the word “the” appears 128 times, the dictionary would contain an element with 'the' as the key and 128 as the value. The program should either display the frequency of each word or create a second file containing a list of each word and its frequency.
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The program should open a specified text file, read its contents, then use the dictionary to write an encrypted version of the file’s contents to a second file. Each character in the second file should contain the code for the corresponding character in the first file.
Write a second program that opens an encrypted file and displays its decrypted contents on the screen.
Chapter 1 Solutions
Java How To Program (Early Objects)
Ch. 1 - Computers process data under the control of sets...Ch. 1 - Prob. 1.2SRECh. 1 - Prob. 1.3SRECh. 1 - The programs that translate high-level language...Ch. 1 - Prob. 1.5SRECh. 1 - software is generally feature complete,...Ch. 1 - Prob. 1.7SRECh. 1 - Prob. 2.1SRECh. 1 - The command from the JDK compiles a Java program.Ch. 1 - A Java source code file must end with thefile...
Ch. 1 - When a Java program is compiled, the file produced...Ch. 1 - The file produced by the Java compiler...Ch. 1 - Prob. 3.1SRECh. 1 - Java programmers concentrate on creating, which...Ch. 1 - Prob. 3.3SRECh. 1 - A new class of objects can be created conveniently...Ch. 1 - is a graphical language that allows people who...Ch. 1 - The size, shape, color and weight of an object are...Ch. 1 - Prob. 1.1ECh. 1 - Prob. 1.2ECh. 1 - Prob. 1.3ECh. 1 - Prob. 1.4ECh. 1 - Prob. 1.5ECh. 1 - Prob. 1.6ECh. 1 - Prob. 1.7ECh. 1 - languages are most convenient to the programmer...Ch. 1 - The only language a computer can directly...Ch. 1 - Prob. 1.10ECh. 1 - Theprogramming language is now used to develop...Ch. 1 - initially became widely known as the development...Ch. 1 - Prob. 2.3ECh. 1 - Theprogramming language was developed by Bjarne...Ch. 1 - Java programs normally go through five...Ch. 1 - Prob. 3.2ECh. 1 - Prob. 3.3ECh. 1 - A(n)is a software application that simulates a...Ch. 1 - Thetakes the .class files containing the programs...Ch. 1 - Prob. 3.6ECh. 1 - Explain the two compilation phases of Java...Ch. 1 - Prob. 5ECh. 1 - Prob. 1MDCh. 1 - Prob. 2MDCh. 1 - (Attributes of Hybrid Vehicles) In this chapter...Ch. 1 - Prob. 4MD
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