Write a void method selectionSortDescendTrace() that takes an integer array, and sorts the array into descending order. The method should use nested loops and output the array after each iteration of the outer loop, thus outputting the array N-1 times (where N is the size). Complete main() to read in a list of up to 10 positive integers (ending in -1) and then call the selectionSortDescendTrace() method. If the input is: 20 10 30 40 -1 then the output is: 40 10 30 20 40 30 10 20 40 30 20 10

Java Programming For this assignment, you are required to create a program named SelectionSortPA.java and implement selection sorting algorithm as specified below: Public static void selectionSort(int[] arr) Your main method accepts a number N from the command argument list. Then use the number N to create an N-element int array. Assign random numbers between [0, Integer.MAX_VALUE) to each of the N elements of the array. Call selectionSort method to sort the array. Display the array elements after each iteration of selection sort. Verify the array is sorted after calling your sorting method. If you implement all the required methods correctly, the driver program should generate outputs similar to the sample below:

Add a new method to ArrayTools with filter. Make this method accept a String array. Change all the Strings that are longer than 5 characters to uppercase. Write in Java and use test cases 1 & 2 as a result.

A run is a sequence of adjacent repeated values. Write a program that generates a sequence of 20 random die tosses in an array and that prints the die values, marking the runs by including them in parentheses, like this: 12 (5 5) 3 124 3 (2 22 2) 3 6 (5 5) 6 3 1 Use the following pseudocode: 1. Set a boolean variable inRun to false 2. For each valid index i in the array A. If inRun If values[i] is different from the preceding value Print ) o inRun = false · If not inRun o If values[i] is the same as the following value Print ( inRun = true. Print values[i] 3. If inRun, print )

Please use the information on the first screenshot about a class BST and node class to implement a method named "randomArray" in the file named "BSTTest.java" that tests a specific sorting algorithm. This method will take one parameter: size of a randomly generated array (int): e.g., 10 This method will: Generate and return a random array of the length specified by the parameter The value range of each element should be between 0 and 1000 (inclusive) >>> randomArray(5). >>> [1, 2, 3, 7, 10] Implement a method named "test" in the file named "BSTTest.java". This method should take advantage of the implemented randomArray and print out information as such: Testing of BST starts. Insert 3 Insert 2 Insert 5 Insert 100 Delete 3. The traverse gives a BST as 3, 5, 100 Testing of BST ends. Please note that the goal is not to manually code the printings of each line. Try your best to make this method as automatic as possible. There are no limits on what parameters this...

Four integers are read from input and stored into the array arrayToModify. Write a static method resetFirstValue() that takes an integer array parameter and replaces the first element with 1. Ex: If the input is 55 45 70 65, then the output is: Original array: 55 45 70 65 Changed array: 1 45 70 65 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Scannerscnr=newScanner(System.in); finalintNUM_ELEM=4; int[] arrayToModify=newint[NUM_ELEM]; inti; intuserNum; for (i=0; i<arrayToModify.length; ++i) { arrayToModify[i] =scnr.nextInt(); } System.out.print("Original array: "); printArr(arrayToModify); resetFirstValue(arrayToModify); System.out.print("Changed array: "); printArr(arrayToModify); } }

1. Write a program that calls a method that takes a character array as a parameter (you can initialize an array in the main method) and returns the number of vowels in the array. Partial program is given below. public class CountVowels{ public static void main(String[] args){ char[] arr= System.out.print("There are "+vowels(arr)+" vowels in the array");

Create a class called CustomerListerwith a mainmethod that instantiates an array of Stringobjects called customerName. The array should have room for five Stringobjects. Use an initializer list to put the following names into the array:Cathy Ben Jorge Wanda FreddieUse newto create a second doublearray called customerBalancein the mainmethod. Allow room for five customer balances, each stored as a double.In the loop that prints each customer name, add some code to prompt the user to enter a balance for that customer. Read the keyboard input with a Scannerobject. Use the following balances for the input:100.00234.562.4932.32400.00After all the balances have been entered, print out each customer and his/her balance.

A class Date has methods intgetMonth() and intgetDay(). Write a method public boolean has3OnSameDay(Date[] birthdays) that returns true if at least three birthdays in the array fall on the same date. Your method should work in O(n) time, where n = birthdays.length.

Java - Sort an Array

For java. Refer to picture.

Write a static method: public static double intersectionSum(double[] a, double[] b) that takes two double arrays as arguments and returns the sum of the elements the two arrays have in common. In other words, the result should be the sum of every element in the two arrays where a[i] is equal to b[i] for some index i. Note that the two arrays may not be the same length. In these cases, you should only consider the indices that the arrays have in common (the indices of the shorter array). If either (or both) arrays are empty or null, the result should be 0.0. Example 1: intersectionSum({3.0, -4.0, 5.8, 6.75}, {3.0, 2.5, 5.8, 4.95}) è 8.8, since a[0] == b[0] and a[2] == b[2] and 3.0 + 5.8 = 8.8 Example 2: intersectionSum({8.5, 9.75, 1.25}, {3.5, 9.75, 1.25, 8.5, -2.34}) è11.0, since a[1] == b[1] and a[2] == b[2] and 9.75 + 1.25 = 11.0

Create an ArrayList of strings to store the names of celebrities or athletes. Add five names to the list. Process the list with a for loop and the get() method to display the names, one name per line. Pass the list to a void method. Inside the method, Insert another name at index 2 and remove the name at index 4. Use a foreach loop to display the arraylist again, all names on one line separated by asterisks. After the method call in main, create an iterator for the arraylist and use it to display the list one more time.