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Consider an array of integers as below: int[] a = {5, 2, -4, 3, 0, -5, 7, 11, 6, 13} Complete the method named count(int[] a) in the class Count. The method should return the number of positive numbers in the array. Thus count(a) should return 7 (not counting the 2 negative numbers and 0). On examining your code for count (your solution to part-a), you will see a test similar to this: if (a[i]>0) {...}. If we were to now ask you to modify the count method so that it counted the number of negative numbers, it would be trivial: All that you would have to do is change the greater-than comparison operator ((">"))to the less-than operator ("<"). If we were to ask you to modify the count method to count the number of even numbers (whether positive or negative) then you would modify your code to have a test along the following lines: if (isEven(a[i])) {...}. Similarly, you could change your code for other types of counting (prime numbers, numbers greater than 10, etc). Note that in each case we can do any type of counting we like but we need to edit the code for the count method. This is a simple example of enhancing the functionality of existing code. For this part of the question, you will write Java code that allows you to enhance the counting functionality without modifying the code of existing methods. You will do this using the power of inheritance and polymorphism. Complete the method countIF that is similar to your implementation of count (from the earlier part of this question) but takes as parameter an object that implements the appropriate test. The signature of countIF is as below: int countIF( int[] a, Predicate p) Complete the class Predicate which has just one method that returns true if the parameter is greater than 0: boolean test(int x){ ... ? ... } When countIF is invoked with a Predicate object, the behaviour will be as before: Your code will count the number of integers greater than 0 (i.e., the execution would return 7). Now complete the two classes (IsNegative and IsEven) as subclasses of the Predicate class to help you count negative (IsNegative) and even numbers (IsEven). class IsNegative extends Predicate {...} class IsEven extends Predicate {...} Note: IsNegative and IsEven classes should have a test method with the same signature as before: boolean test(int x). Once these classes have been written you will be able to pass in an instance of the appropriate class to countIF to do the testing we need: countIF( a, new IsNegative() ) countIF( a, new IsEven() ) The first call above would return 2 for our array. The second call would return 4.
Write a program in java that requests 2 numbers from the user and then passes these 2 numbers to a method findMax that displays the largest number. Make sure your method is called fron main(). Test the method by passing various data to it
Your program should store these correct answers in an array. (Store each question's correct answer in an element of a string array.) the program should ask the user to enter the student's answers for each of the 20 questions, which should be stored i..
This is a project report showing the essential details and coding structures related with the implementation of encryption techniques and steganography in JAVA.
Program Specifications: In the new implementation, the two classes, Student and Grades, are defined with the following operations/methods.
Write down java program for real estate agent. Program must perform the following tasks: ask users for average house price for the each of past 5 years for single family residence of 1500 square feet.
Design a java program that has two parallel arrays: a string array named people that is initialized with the names of seven of your friends, and a string array named phoneNumbers that is initialized with your friends phone numbers.
Create file Lab7.java with a main method. Inside your main method, write a segment of code which instantiates an object of the Student class (This class has been created for you in the Student.java file that is provided as part of this lab).
Create a file that contains your favorite movie quote. Use a text editor such as Notepad, and save the file as quote.txt. Copy the file contents,
Write a Java program called SalesInfoMiner that reads in a file of products, stored in text format. The program must then read in information about past sales transactions and output all the products to a new file, sorted by product description,..
Java program to input pairs of natural numbers.
Write a version of sumPairs that sums each component of the pairs separately, returning a pair consisting of the sum of the first components and the sum of the second components. So basically [(3,1)(10,3)] would return (13,4).
Students have names, addresses and courses. Implement the interface class RegisterStudent. RegisterStudent has one method, public boolean register, which returns the boolean value of true or false if the student is successfully registered for the ..
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