Write a void method which will print out a sentence “Hello World!”. Call the method from main(). Plz answer this question using java rules.
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Write a void method which will print out a sentence “Hello World!”. Call the method from main().
Plz answer this question using java rules.
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- Need help with this java problem. Some Websites impose certain rules for passwords.Write a method that checks whether a string is a valid password. The method must takes a password as a parameter and return a boolean value. If the password is valid, returns true, otherwise, return false. Suppose the password rules are as follows:- A password must have at least eight characters.- A password must contain only letters and digits.- A password must contain at least two digits. Please make sure you write a comment line to document what your method does. Write a program that prompts the user to enter a password, then call the method that checks the password, and displays "Valid Password" if the rulesare followed, or Invalid Password otherwise. The main program must allow the user to check multiple passwords. It should ask the user "Do you want to continue checking anther password (y/n)?"Need help with following Java method: import java.util.Scanner; import java.lang.Math; public class CosineFromScratch { /* The following code demonstrates how to estimate the cosine of a number. Your assignment is to migrate the calculation of the cosine into a new static method named cosine. The method should take one double input and return one double output. Make sure to call the method from main and set the variable estimate equal to the returned value. */ public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("\nGive me a number: "); double x = input.nextDouble(); //Trying to find cosine of this number double correct_cos = Math.cos(x); //START HERE: The following code goes into //the method. //Source for the following: //https://austinhenley.com/blog/cosine.html double num_terms = 10; int div = (int)(x / Math.PI); x = x - (div * Math.PI); int sign = -1; double estimate = 1.0;…Write a java class method named capitalizeWords that takes one parameter of type String. The method should print its parameter, but with the first letter of each word capitalized. For example, the call capitalizeWords ("abstract window toolkit"); will produce the following output: Abstract Window Toolkit
- Consider the pseudo-code method below: How many times will "1" be printed when the method is called with a parameter of 3?Is there a way to create a java program on Branching and selecting method on problems like this? Suppose that we are working for an online service that provides a bulletin board for its users. We would like to give our users the option of filtering out profanity. Suppose that we consider the words cat dog and rabbit to be profane. Write a program that reads a string from the keyboard and test whether the string contain any one of these words. Your program should find words like cAt that differ only in case. Have your program reject only lines that contain one or more of the three words exactly. For example, concatenation is a small category should not be considered profane. This problem can be solved easily. If you add a space to the beginning of the string and a space at the end of the string you only need to check if space cat space or space dog space or space rabbit space is in the string. Use three if statements; one for each word. If one or more of the words are there set…what is the java code for the class and Write one or more tests that check that the method works as specified in all cases? intro: A Fibonacci series is a popular sequence of numbers. The first two numbers of this series are 0 and 1. After this, the next Fibonacci number is obtained by adding the previous two. Thus the Fibonacci sequence is 0,1,1,2,3,5,8,13,... A Fibonacci counter is a machine that counts Fibonacci numbers. Much like a step tracker, it can be started at any count. It can be incremented or decremented by 1 (count falling below 0 is invalid). Given a number ’n’, the nth Fibonacci number can be calculated directly using Binet’s formula: ???(?)=15√((1+5√2)?−(1−5√2)?) what to do: Write a class FibonacciCounter that represents a single Fibonacci counter. This class should contain the following: A constructor that takes the initial count value and initializes the object appropriately. A method that returns a FibonacciCounter object with its count incremented by 1. A…
- Needs to be written in java: Write a program with a main() method that asks the user to input an integer array of 10 elements.Next, create three methods described below. From inside your main() method, call each of thethree methods described below and print out the results of the methods 2, 3, which return values.1. printReverse() - a method that receives an array of integers, then reverses the elements ofthe array and prints out all the elements from inside the method. Print all in one lineseparated by commas (see sample output below).2. getLargest() – a method that receives an array of integers, then returns the largest integervalue in the array. (print result from main())3. computeTwice()- a method that receives the previously reversed array of integers, thenreturns an array of integers which doubles the value of each number in the array (see thesample output below). (print result from main())Sample output:Enter a number:22Enter a number:34Enter a number:21Enter a number:35Enter a…Write a Java method that receives an int as input and returns true if the input parameter is 100 and false otherwise. 4. Consider the following statement. Consider the following method. boolean x = (5 10) finalPrice -= finalPrice e.25; 70.0 System.out.print("Y"}; true if(hasCoupon) else finalPrice -= 5.e; D) 75.e YY false System.out.printin(finalPrice); System.out.print("Z"); What is printed as a result of executing the code segment? E) 95.0Use Java program to add a method printReceipt to the CashRegister class. The method should print the prices of all purchased items and the total amount due. Hint: You will need to form a string of all prices. Use the concat method of the String class to add additional items to that string. To turn a price into a string, use the call String.valueOf(price). Also, the payment information will need to be the same as the price information. Here is the CashRegister class: /** A cash register totals up sales and computes change due.*/public class CashRegister{ private double purchase; private double payment; /** Constructs a cash register with no money in it. */ public CashRegister() { purchase = 0; payment = 0; } /** Records the sale of an item. @param amount the price of the item */ public void recordPurchase(double amount) { purchase = purchase + amount; } /** Processes a payment received from the customer. @param…
- Write a method that takes two string parameters, and tells whether the first is a substring of the second. You can't use framework methods that do this for you, such as indexOf(). In other words, you have to write the loops yourself. But, you can use the primitive methods such as charAt(). Also analyze the program's performance and state the big-O complexity of your method. Provide a screenshot of the code working.5. Write a Java method that prints integers from 1 to 100 (see the output). Use the following output as a guide: 5 2 12 22 32 42 52 62 72 82 92 Press any key to continue 3 13 23 33 43 53 63 73 83 93 4 ? 8 18 28 38 48 58 68 78 88 98 1 11 31 41 51 61 71 81 91 14 24 34 44 54 64 74 84 85 94 15 25 35 45 55 65 75 26 36 46 56 66 76 86 96 37 47 57 67 ?? 87 97 19 29 39 49 59 69 79 89 99 10 20 30 40 50 60 70 80 90 100 95 123456780 6669 H23 456