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- Write a static method count Evens() that has four integer parameters, and returns the count of parameters where the value is an even number (i.e. evenly divisible by 2). Ex: If the four parameters are: 1 22 11 40 then the returned count will be: 2 Hint: Use the modulo operator % to determine if each number is even or odd. Your program must define the function: public static int count Evens (int num1, int num2, int num3, int num4)Write a method checks if a given matrix is a unit matrix. An N x N unit matrix is a matrix of N rows and N columns where all the diagonal elements are ‘1’s and all the remaining elements are ‘0’s. The method should take a 2D array of integers as argument and return a Boolean which is true/false depending on whether the matrix corresponding to the 2D array is a unit matrix or not. Test the method in the ‘main’ method. For problems asking for 'methods', you need to write the method, and the 'main' method which is used as a 'driver' to test the given method.In java, Write a method checks if a given matrix is a unit matrix. An N x N unit matrix is a matrix of N rows and N columns where all the diagonal elements are ‘1’s and all the remaining elements are ‘0’s. The method should take a 2D array of integers as argument and return a Boolean which is true/false depending on whether the matrix corresponding to the 2D array is a unit matrix or not. Test the method in the ‘main’ method. For problems asking for 'methods', you need to write the method, and the 'main' method which is used as a 'driver' to test the given method.
- Java program Write and test a void method called inOrder() that takes three strings and prints them out in the correct alphabetical order. For example the call of inOrder("abc", "mno", "xyz") will print out the values in the order abc -> mno -> xyz. However the call of inOrder("xyz" , "mno", "abc") will also print abc -> mno -> xyz.. Make sure to test your method, with at least 5 different input variations.Write a method, countEvens(), that has four integer parameters, and returns the count of parameters where the value is an even number (i.e. evenly divisible by 2). Ex: If the four parameters are: 1 22 11 40 the method countEvens() returns: 2 Hint: Use the modulo operator % to determine if each number is even or odd. Your program must define the method:public int countEvens(int num1, int num2, int num3, int num4) code; import java.util.Scanner; public class CountEvens { /* Type your code here */ public static void main(String[] args) { Scanner scnr = new Scanner(System.in); CountEvens labObject = new CountEvens(); int num1; int num2; int num3; int num4; num1 = scnr.nextInt(); num2 = scnr.nextInt(); num3 = scnr.nextInt(); num4 = scnr.nextInt(); int result = labObject.countEvens(num1, num2, num3, num4); System.out.println("Total evens: " + result); }}The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() method, which has an index, n (starting at 0), as a parameter and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: fibonacci(7) is 13
- write a java method with followin instraction : Write a method called prioritizeQueue to give priority for vaccination for elderly persons. The method is to be in a class called VaccinationQueue and has two parameters q1 and q2 type ArrayQueue. The q1 and q2 data are of type Integer. Assume that initially q1 is not empty and q2 is empty. The method will insert from q1 those elements towards the beginning of the queue (front) q2 whose data is greater than or equal to 45 and will insert those elements whose data is less than 45 and greater than or equal to 18 towards the end (rear) of q2. Any data item less than 18 of q1 will not be inserted in q2. It returns the number of elements added to q2. Class ArrayQueue and all its methods including iterator are available for use. You can also create temporary queues. You are not allowed to use arrays or any other data structure. Example: Before method call: front rear q1: 14 25 50…A pet shop wants to give a discount to its clients if they buy one or more pets and at least four other items. The discount is equ pets. al to 15 percent of the cost of the other items, but not the Implement a method: public static void discount (double[] prices, boolean[] İsPet, int nitens) The method receives information about a particular sale. For the i th item, prices ti) price before any discount, and isPet [i] Is true if the iten 1s a pet. is the Write a program that prompts a cashier to enter each price and then a y for a pet or N for another item. Use a price of -1 as a sentinel. Save the inputs in an array. Call the method that you implemented, and display the discount.Write a method (with a parameter n), n: integer type that prints numbers from 1 to n. The print out should be 5 numbers per line. All the output numbers should be aligned well. Call the method with n=13 and n=10 in the main()
- The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() method, which has an index, n, as parameter and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: fibonacci(7) is 13 Note: Use a for loop and DO NOT use recursion. code: import java.util.Scanner; public class FibonacciSequence { public int fibonacci(int n) { /* Type your code here. */ } public static void main(String[] args) { Scanner scnr = new Scanner(System.in); FibonacciSequence program = new FibonacciSequence(); int startNum; startNum = scnr.nextInt(); System.out.println("fibonacci(" + startNum + ") is " + program.fibonacci(startNum)); }}The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() method, which has an index, n, as parameter and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: fibonacci(7) is 13 Note: Use a for loop and DO NOT use recursion. import java.util.Scanner; public class LabProgram { public static int fibonacci(int n) { /* Type your code here. */ } public static void main(String[] args) { Scanner scnr = new Scanner(System.in); int startNum; startNum = scnr.nextInt(); System.out.println("fibonacci(" + startNum + ") is " + fibonacci(startNum)); }}public int getCoefficient (int k) Returns the coefficient for the term of order k. For example, the term of order 3 in the previous polynomial equals 5, whereas the term of order 0 equals 42. This method should work correctly even when k is negative or greater than the actual degree of the polynomial, and simply return zero for such nonexistent terms.