Absolute Java (6th Edition)
6th Edition
ISBN: 9780134041674
Author: Walter Savitch, Kenrick Mock
Publisher: PEARSON
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A bit new to methods and need a little bit of help.
Swap Method
Your task is to write a public static method named swap that takes a single parameter which is an array of doubles. This method should swap the first and last element in the array and then return the adjusted double array.
You can assume that all arrays passed into the method are a length of 2 or more.
For example, the test data provided when passed into the swap method should go from:
{8.34, 7.221, 10.643, 93.2}
to
Java:
Write a complete method to create an array of random integers.
Method Specification
The method takes in three integer parameters: the array size, the lower bound, and the upper bound. The method also takes in a boolean parameter.
The method creates and returns an integer array of the specified size that contains random numbers between the lower and upper bound., using these rules:
The lower bound is always inclusive.
If the boolean parameter is true, the upper bound is also inclusive.
If the boolean parameter is false, the upper bound is not inclusive (meaning it is exclusive).
If any of the parameters are invalid, null is returned.
Driver/Tester Program
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Java:
Write a complete method to create an array of random integers.
Method Specification
The method takes in three integer parameters: the array size, the lower bound, and the upper bound. The method also takes in a boolean parameter.
The method creates and returns an integer array of the specified size that contains random numbers between the lower and upper bound., using these rules:
The lower bound is always inclusive.
If the boolean parameter is true, the upper bound is also inclusive.
If the boolean parameter is false, the upper bound is not inclusive (meaning it is exclusive).
If any of the parameters are invalid, null is returned.
Driver/Tester Program
I have provided you with a driver/tester program that you can use to test your code before submitting. Paste your code into the placeholder at the top of the file. Review the Homework FAQ page, which contains instructions and a video of how to use the provided file. If you aren't sure how to use the tester or have any…
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- Blackjack is a card game where the goal is to reach a score of 21. Create a java version of this game with the following requirements. Extend the JPanel class and create an array of 52 cards. Add four sets of numbers from 1 to 10. Use J for Jack, Q for queen, K for king, and A for ace. Jack through king will have a value of 10, and the ace will have a value of 11. Deal two cards to the user and two cards to the computer. Do not show the value of the computer's first two cards to the user. Add buttons Hit, Stay, and Reset. If the user selects the "Hit" button, randomly select one of the cards from the array, and give it to the user. (After selecting a card, do not reuse this index during the rest of the game.) If the dealer has less than 21, "hit" the dealer, too. When the user selects the "Stay" button, add up the card values. The winner is the person who is closest to 21 without going over. Name the class Blackjack.java.arrow_forward. Create a testEmployees class. Do the following: Declare an array called arrEmp of 10 Employee type objects in the main method. Write a static method called fillArray() that receives the arrEmp array. Use a while loop to enter the information (type of contract) of a number of new employees. Quit input by entering the character X instead of the type of contract. For each employee create an object and save the object in the array. Return the array to the main method. Call the static fillArray() method from the main method. Write a static method called displayArray() to receive the array and display a numbered list of the information of the employees using a for-loop and the toString() method. Call the static displayArray() method from the main method. Write a static method called updateEmpCommission() to receive the array and update the commission of some of the employees as follows: Use a loop to update a number of employees' commission. Use a sentinel value -1 to…arrow_forwardQuestion: 1. Write a method that has an int parameters. Creates an array of integers of that size. Reads in values for the array from the user. Returns the newly created array. 2 Write a method that given an array of integers.returns the index of the smallest integer.arrow_forward
- 1) Write a method that returns the range of an array of integers. The range is the difference between the highest and lowest values in the array. The signature of the method should be as follows. public static int computeRange(int[] values)arrow_forwardJava Problem: Implementing a method to print a cell's neighbors on a 2D array. The method's header is provided. The main method (do not alter it)w ill read N numbers to create the 2D array and it will call the method for you. Do not go out of the bounds of the 2D array. I have attached what it should look like with the following input: 4 4 1 2 3 4 7 8 9 10 13 14 15 16 19 20 21 22 2 2 Code I have so far: import java.util.Arrays;import java.util.Scanner;public class Problem3 {public static void printNeighbours(int[][] data, int row, int col){}public static void main(String[] args) {Scanner kb = new Scanner(System.in);int[][] data = new int[kb.nextInt()][kb.nextInt()];for (int i = 0; i < data.length; i++) {for (int j = 0; j < data[0].length; j++) {data[i][j] = kb.nextInt();}}System.out.println("The 2D Array:");for (int[] cols : data) {System.out.println(Arrays.toString(cols));}int row = kb.nextInt();int col = kb.nextInt();System.out.printf("The centre point is: %d %d…arrow_forward3. write a method called insert that inserts an element into an integer array. It should take 3 parameters: an int array, the number to be inserted and the index it should be inserted at. It should return a new array that has the element inserted at the index (the new array should have a length 1 longer than the original array). Sample code int[] a = {1,2,3,4,5}; int[] inserted = insert (a,9,0); printArray (inserted); int [] a = {1,2,3,4,5}; int[] inserted = insert (a,9,3); printArray(inserted); int [] a = {1,2,3,4,5}; int[] inserted = insert(a,9,5); | printArray(inserted); Sample output 912345 123945 123459arrow_forward
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