In the code below, we use a method from the Scanner object to retrieve a user response. exchangeRate = in.nextDouble() Why are there multiple methods like nextDouble() to retrieve user response? Explain how and when you would use one method over the other.
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In the code below, we use a method from the Scanner object to retrieve a user response.
exchangeRate = in.nextDouble()
Why are there multiple methods like nextDouble() to retrieve user response? Explain how and when you would use one method over the other.
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- You are to implement removeHead, and removeTail and you also have to create the following functions (for visual purposes of the detail explanation, header and trailer sentinels are described as h and t respectively): IMPORTANT NOTE: For all the methods that has the pos parameter i.e. addAt, removeAt, move, make sure to access that specified position from whichever is nearer - the head or the tail - similar to what we have done in the get method. Example DoublyLinkedList: h <-> 10 <-> 30 <-> 40 <-> 50 <-> t int add(int num) This will add the element num into the last element of the linked list and return the position of the newly-added element. In the above example, having add(60) will return 5 as it is the fifth position in the list. int remove(int num) This will remove the first instance of the element and return the position of the removed element. In the above example, having remove(40) will return 3 as 40 was the third element in the linked list…In this part you will handle a new kind of transaction called a transfer where money is moved from one account to another account. Implement the method: • public boolean transferFromOneToAnother(String fromName, String toName, double amount) - Make a transfer from one account (fromName) to another (toName). Return true if funds are sufficient for transfer (otherwise false ). (Hint: this is similar to the two methods from Part 2, but you need to think a bit about the success/failure cases.) In the input file, transfers are indicated by listing two account handles and an amount, like lines 2, 4 and 6 of the file input6.txt where funds are transferred from Alice to Bob and vice versa: DEPOSIT Alice 300 Alice Bob 150 DEPOSIT Alice 400 Alice Bob 250 WITHDRAW Bob 200 Bob Alice 600 The result of running it should look like this: % javac-introcs TigerCoin.java % java-introcs TigerCoin Alice : 300.0 (success: true) Alice -> Bob : 150.0 (success: true) DEPOSIT -> Alice : 400.0 (success: true)…Predict what you think will happen if you change the test in insertMoney to use the greater-than or equal-to operator: if(amount >= 0) Check your predictions by running some tests. What is the one situation in which it makes a difference to the behavior of the method?
- In this exercise, you are going to build on your Circleclass from the previous exercise. You are going to add 2 method, areaDifference and perimeterDifference. Both methods take a doubleradius of a second circle and return the difference from the current circle. For example, if you create a Circle object with a radius of 4 and call areaDifference(3), you will return the diffence between the area of a circle with radius 4 and the area of a circle with a radius of 3. perimeterDifferencewould be the same. Make sure you create at least one Circle and test and print the results of your methods. in javaAnswer the given question with a proper explanation and step-by-step solution. Write a method that takes in an array of Point2D objects, and then analyzes the dataset to find points that are close together. Be sure to review the Point2D API. In your method, if the distance between any pair of points is less than 10, display the distance and the (x,y)s of each point. For example, "The distance between (3,5) and (8,9) is 6.40312." The complete API for the Point2D ADT may be viewed at http://www.ime.usp.br/~pf/sedgewick-wayne/algs4/documentation/Point2D.htmlLinks to an external site.. Do not compare a point to itself! Try to write your program directly from the API - do not review the ADT's source code. (Don't worry too much about your answer compiling - focus on using an API from its documentation.) Your answer should include only the method you wrote, do not write a complete program.In this exercise, you are going to build on your Circleclass from the previous exercise. You are going to add 2 method, areaDifference and perimeterDifference. Both methods take a doubleradius of a second circle and return the difference from the current circle. For example, if you create a Circle object with a radius of 4 and call areaDifference(3), you will return the diffence between the area of a circle with radius 4 and the area of a circle with a radius of 3. perimeterDifferencewould be the same. Make sure you create at least one Circle and test and print the results of your methods. given: public class Circle{private double radius;public Circle(double theRadius){radius = theRadius;}// Add a method called area that returns the area of a circle// using Math.PIpublic double area(){return Math.PI*radius*radius;}// Add a method called perimeter that returns the perimeter of a// circle using Math.PIpublic double perimeter(){return Math.PI*2*radius;}}
- Consider the program below. Replace the tags _??1_ and _??2_ respectively, by filling in the text fields below, such that testAdd() is a valid JUnit test which tests the correctness of built-in addition and passes:PLEASE ENSURE TO USE THE FRAMEWORK PROVIDED IN THE IMAGES, AND THAT IT WORKS WITH THE TESTER CLASS. PLEASE EDIT BOTH THE TEST CLASS, DO NOT EDIT THE MAIN METHOD. Write a BankAccountTester class whose main method constructs a bank account, deposits $1,000, withdraws $500, withdraws another $400, and then prints the remaining balance. Also print the expected result.Add a toString() method to Fraction class that returns the fraction as aString in the form "x / y", where x and y are numerator and denominatorrespectively. As the method does not do any display itself, the output can be done by a client program that calls the method in an output statement. Use client program to test this functionality; i.e. provide an output statement to display a fraction as its String representation. class Fraction2{private int n, d;public Fraction(){this.n = this.d = 0; //Initialize the values}public Fraction(int n, int d){this.n = n; //Initialize the variablesthis.d = d;}//Define the getter function getNum() that returns the numeratorpublic int getNum(){//Returns numeratorreturn n;} //Define the getter function getDen() that returns the denominatorpublic int getDen(){//Returns denominatorreturn d;}//Define the boolean function isZero() that returns 0 if numerator is 0 and denominator is not equals to zeropublic boolean isZero(){return(getNum() == 0 &&…
- The following code is poorly structured. Rewrite it so that it has a better structure and avoids redundancy. To help eliminate redundancy, convert the code into a method named spending that accepts two parameters: a Scanner for the console, and a String for a single person's name, and prints the appropriate information about that person's bills. Your method could be called twice (once for John and once for Jane) to replicate the original code's behavior.Answer the given question with a proper explanation and step-by-step solution. USING JAVA: ---Sorting the Invoices via dates--- Another error that will still be showing is that there is not Comparable/compareTo() method setup on the Invoice class file. That is something you need to fix and code. Implement the use of the Comparable interface and add the compareTo() method to the Invoice class. The compareTo() method will take a little work here. We are going to compare via the date of the invoice. The dates of the Invoice class are by default saved in a MM-DD-YYYY format. So they have a dash '-' between each part of the date. So you will need to split the date of the current invoice AND split the date of the object sent to the method. We have three things to compare against here. First we need to check the year. If the years are the same then you should go another step forward and compare the months. If the months are the same then you will lastly have to compare the day. Use whatever…For this exercise, we are going to look at how we can create a .equals method. Remember, to compare objects, we cannot just use ==. We need to create a criteria to determine if the objects are equal. In our case, we will say that two people are the same if both the name and birthday match. We are going to write a program that prompts the user for a person’s name and birthday and a student’s name, birthday, and grade, and decide if they are the same person. Start in the Person class creating the .equals method. Remember, this should take the other Person as an input and return a boolean if both the name and birthday are equal. Once completed, create the tester class where you will prompt the user for information. Sample output is provided below. Sample Output Please enter the Person's name: Tanner Please enter the Person's birthday: 5/4/2005 Please enter the Student's name: Tanner Please enter the Student's birthday: 5/4/2005 Please enter the Student's grade: 12 Same: true…