Java Programming
9th Edition
ISBN: 9780357616635
Author: Joyce Farrell
Publisher: CENGAGE L
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Chapter 1, Problem 1PE
Explanation of Solution
Class identifiers:
- Naming convention for class name is “Capitalize the first letter of each word”. For example: “ComputePerimeter”, “AngleCalc”, and “TestScore”.
| Class Identifiers | a | b | c | ||
| Legal | Conventional | Legal | Unconventional | Illegal | |
| myClass | Yes | Yes, the starting letter of class identifier should be upper case in java | |||
| void | Yes, the class identifier is illegal, since “void” is keyword | ||||
| Golden Retriever | Yes, it is illegal to have space in class identifiers | ||||
| invoice# | Yes, A java class identifier can contain only letters, digits, underscores, or dollar sign... | ||||
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The IT director opened the department staff meeting today by saying, "I've got some good news and
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2. Signed Integers
Unsigned binary numbers work for natural numbers, but many calculations use negative
numbers as well. To deal with this, a number of different methods have been used to represent
signed numbers, but we will focus on two's complement, as it is the standard solution for
representing signed integers.
2.1 Two's complement
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two's complement number can be written as: Σ2 2¹ di 2n-1 dn
• Otherwise exactly the same as unsigned integers.
i=0
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• A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1,
or 1 becomes 0) and then add 1 to the least significant bit.
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2.2 Exercises
For questions 1-3, answer each one for the case of a two's complement number and an
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Chapter 1 Solutions
Java Programming
Ch. 1 - Prob. 1RQCh. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Prob. 5RQCh. 1 - Prob. 6RQCh. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - Prob. 9RQCh. 1 - Prob. 10RQ
Ch. 1 - Prob. 11RQCh. 1 - Prob. 12RQCh. 1 - Prob. 13RQCh. 1 - Prob. 14RQCh. 1 - Prob. 15RQCh. 1 - Prob. 16RQCh. 1 - Prob. 17RQCh. 1 - Prob. 18RQCh. 1 - Prob. 19RQCh. 1 - Prob. 20RQCh. 1 - Prob. 1PECh. 1 - Prob. 2PECh. 1 - Prob. 3PECh. 1 - Prob. 4PECh. 1 - Prob. 5PECh. 1 - Prob. 6PECh. 1 - Prob. 7PECh. 1 - Prob. 8PECh. 1 - Prob. 9PECh. 1 - Prob. 10PECh. 1 - Prob. 11PECh. 1 - Prob. 12PECh. 1 - Prob. 1DECh. 1 - Prob. 1GZCh. 1 - Prob. 1CPCh. 1 - Prob. 2CP
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