Java: An Introduction to Problem Solving and Programming plus MyProgrammingLab with Pearson eText -- Access Card Package (7th Edition)
7th Edition
ISBN: 9780133862119
Author: Walter Savitch
Publisher: PEARSON
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Chapter 5.1, Problem 10STQ
Define a method called getDensity that could be added to the definition of the class SpeciesSecondTry in Listing 5.6
. This method has one parameter of type double that is named area. The parameter area gives the area occupied by the species, expressed in square miles. The method getDensity returns a value of type double that is equal to the number of individuals per square mile of the species. You can assume that the area is always greater than zero. (Hint: The definition is very short.)
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Fill in the parameters in the second method header for the overloaded method printCourse(). The number, type, and order of the method parameters are indicated in the method call from main().
Ex: If the input is 82 Ethics, then the output is:
Ethics grade: 82 Immunology grade: 87
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System.out.println(courseName+" grade: "+grade);
}
publicstaticvoidprintCourse(/* Your code goes here */) {
System.out.println("Immunology grade: "+inputGrade);
}
publicstaticvoidmain(String[] args) {
Scannerscnr=newScanner(System.in);
intgrade;
StringcourseName;
grade=scnr.nextInt();
courseName=scnr.next();
printCourse(grade, courseName);
printCourse(87); // Overloaded method called
}
}
Write in java:
Define a class called Country. A Country has populationSize, area, capital, currency, and abbreviation (2-3 letters taken from the country name). Define at least two constructors, at least two getter methods, at least two setter methods, and Override the toString() and the equals() methods. The equals() must return true if the two countries have the same capital and populationSize and returns false otherwise.
The abbreviation is the second letter and first letter of the country name and must be generated automatically (e.g. if the country name is Palestine the abbreviation is AP, if the country name is Jordan the abbreviation is OJ.)
Write a main method, define an array of country objects, read countries data from the user, if two countries have the same abbreviation add the last letter from the country name to the abbreviation of the country inserted last. Display countries whose capital name ends with the letter ‘a’ or ‘A’
Write a program that calls methods for each of the following mini problems from its main method.
Us a single Scanner for the program declared in the class asprivate Static Scanner keyboard = new Scanner(System.in);
You have three identical prizes to give away and a pool of 10 finalists. The finalists are assigned numbers from 1 to 10. Write a method to randomly select the numbers of 3 finalists to receive a prize. Make sure not to pick the same number twice. For example, picking finalists 3, 6, 2 would be valid but picking 3, 3, 11 would be invalid because finalist number 3 is listed twice and 11 is not a valid finalist number. For this problem you can insert the following line of code to generate a random number between 1 and 10:int num = (int) (Math.random() * 10) +1;
Notes: This project uses random numbers in a loop. You might wish to introduce the Random class instead of Math.random().
2. Suppose we can buy a chocolate bar from the vending machine for $1 each. Inside…
Chapter 5 Solutions
Java: An Introduction to Problem Solving and Programming plus MyProgrammingLab with Pearson eText -- Access Card Package (7th Edition)
Ch. 5.1 - Consider the program in Listing 5.4 . Suppose you...Ch. 5.1 - Prob. 2STQCh. 5.1 - Prob. 3STQCh. 5.1 - Suppose every species in the world has a peculiar...Ch. 5.1 - Revise the definition of the method writeOutput in...Ch. 5.1 - Revise the definition of the method readInput in...Ch. 5.1 - Revise the definition of the method...Ch. 5.1 - What is the meaning of (int) that appears in the...Ch. 5.1 - Prob. 9STQCh. 5.1 - Define a method called getDensity that could be...
Ch. 5.1 - Define a method called changePopulation that could...Ch. 5.1 - Define a method called changePopulation that could...Ch. 5.2 - In Listing 5.12, we set the data for the object...Ch. 5.2 - Give preconditions and postconditions for the...Ch. 5.2 - What is an accessor method? What is a mutator...Ch. 5.2 - Give the complete definition of a class called...Ch. 5.2 - Prob. 17STQCh. 5.2 - In the definition of the method in Listing 5.15,...Ch. 5.2 - What is a well-encapsulated class definition?Ch. 5.2 - When should an instance variable in a class...Ch. 5.2 - Prob. 21STQCh. 5.2 - In a class definition, is anything private ever...Ch. 5.2 - In a class definition, is the body of any method...Ch. 5.3 - What is a reference type? Are class types...Ch. 5.3 - When comparing two quantities of a class type to...Ch. 5.3 - Prob. 26STQCh. 5.3 - Write a method definition for a method called...Ch. 5.3 - Given the class Species as defined in Listing...Ch. 5.3 - After correcting the program in the previous...Ch. 5.3 - What is the biggest difference between a parameter...Ch. 5.3 - Prob. 31STQCh. 5.3 - Write an equals method for the class Person...Ch. 5.4 - Prob. 33STQCh. 5.4 - Prob. 34STQCh. 5.4 - Prob. 35STQCh. 5.4 - Prob. 36STQCh. 5.4 - Prob. 37STQCh. 5 - Design a class to represent a credit card. Think...Ch. 5 - Repeat Exercise 1 for a credit card account...Ch. 5 - Repeat Exercise 1 for a coin instead of a credit...Ch. 5 - Repeat Exercise 1 for a collection of coins...Ch. 5 - Consider a Java class that you could use to get an...Ch. 5 - Consider a class that keeps track of the sales of...Ch. 5 - Consider a class MotorBoat that represents...Ch. 5 - Prob. 8ECh. 5 - Prob. 9ECh. 5 - Prob. 10ECh. 5 - Write a program to answer questions like the...Ch. 5 - Define a class called Counter. An object of this...Ch. 5 - Prob. 3PCh. 5 - Define a Trivia class that contains information...Ch. 5 - Define a Beer class that contains the following...Ch. 5 - Write a grading program for an instructor whose...Ch. 5 - Add methods to the Person class from Self-Test...Ch. 5 - Create a class that represents a grade...Ch. 5 - Write a program that uses the Purchase class in...Ch. 5 - Write a program to answer questions like the...Ch. 5 - Consider a class that could be used to play a game...Ch. 5 - Consider a class BasketballGame that represents...Ch. 5 - Consider a class ConcertPromoter that records the...Ch. 5 - Prob. 9PPCh. 5 - Consider a class Movie that contains information...Ch. 5 - Repeat Programming Project 18 from Chapter 4, but...Ch. 5 - Prob. 12PP
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