Write a Java program that uses ArrayList and Iterator. It should input from user the names and ages of your few friends in a loop and add into ArrayList. Finally, it should use an Iterator to display the data in a proper format.
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Write a Java program that uses ArrayList and Iterator. It should input from user the names and ages of your few friends in a loop and add into ArrayList. Finally, it should use an Iterator to display the data in a proper format.
( Sample run of the program:-)
List of my Friends
Enter name and age [friend# 0]
Khalid Al-shamri
22.5
Do you want to add another friend (y/n)? y
Enter name and age [friend# 1]
Rahsed Al-anazi
21.1
Do you want to add another friend (y/n)? y
Enter name and age [friend# 2]
Salem Al-mutairi
23.7
Do you want to add another friend (y/n)? n
Here is the data you entered:
0. Khalid Al-shamri, 22.5
1. Rahsed Al-anazi, 21.1
2. Salem Al-mutairi, 23.7
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- Write a java program that uses an ArrayList object to store the following set of names in memory: [Steve, Tim, Lucy, Pat, Angela, Tom] Now write some more code so that the same ArrayList object is augmented with the name 'Steve' after the name 'Lucy' After the ArrayList object has been augmented with the new name, display the original and new lists on the console (as shown below), to verify that the new name is positioned correctly in the list.Write a Java program that will allow the user to play a hangman game repeatedly until theychoose to stop. The game should randomly choose a secret word from a pre-set list of wordsfor the user to guess. Store the list of words available for play in an array so you can randomlychoose them by index during game play.During a turn, the user will guess one letter at a time. Each letter in the secret word shoulddisplay as an asterisk until the letter is guessed by the user. When a correct letter is guessed,the letter should be displayed in the correct position in place of the asterisk. The user hangshimself with the 8th wrong guess and loses the game.Make a character array to hold the characters and asterisks representing the word beingguessed. You can change the contents of this array as the letters are guessed and revealed. Inother words, this array can be used to display the current state of the secret word each round.Here is the list of words the game should choose from for the secret…Rewrite the following piece of java code using iterator pattern. And change the operation inside the for loop to another operation of your own. And What was the advantage of using the iterator ? import java.util.Iterator String[ ] originalData = { "one", "two", "three", "four", "five" }; List<String> strings = new ArrayList<>(Arrays.asList(originalData)); for ( int i=0; i<strings.size(); i++) { // process strings.get(i): here, just printSystem.out.println(strings.get(i));}
- Your activity: write a same java program that will accept 20 integer in a list and returns the index of the first occurrence of the smallest element in the array. Also, write a program to test your method. Write a Java method, smallestIndex, that takes as its parameters an int array and its size, and returns the index of the (first occurrence of the) smallest element in the array. public class Array_labExercise2 { public static void main(String[] args) { int[] list = {56, 34, 67, 54, 23, 87, 66, 92, 15, 32, 55, 15, 88, 22, 30}; System.out.print("List elements: "); printArray(list); System.out.println(); System.out.println("Index of the (first occurenc of the) " + "smallest element in list is: " + smallestIndex(list)); System.out.println("Smallest element in list is: " + list[smallestIndex(list)]); } public static void printArray(int[] list) { int counter; for (counter = 0; counter < list.length; counter++) System.out.print(list[counter] + " ");…Write a program that reads a list of integers, and outputs those integers in reverse. The input begins with an integer indicating the number of integers that follow. For coding simplicity, follow each output integer by a space, including the last one. Assume that the list will always contain fewer than 20 integers. Ex: If the input is: 5 2 4 6 8 10 the output is: 10 8 6 4 2 To achieve the above, first read the integers into an array. Then output the array in reverse. import java.util.Scanner; public class LabProgram { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); int[] userList = new int[20]; // List of numElement integers specified by the user int numElements; // Number of integers in user's list// Add more variables as needed numElements = scnr.nextInt(); // Input begins with number of integers that follow/* Type your code here. */}}Write a program in java that prompts the user to enter an inte- ger m and find the smallest integer n such that m * n is a perfect square. (Hint: Store all smallest factors of m into an array list. n is the product of the factors that appear an odd number of times in the array list. For example, consider m = 90, store the factors 2, 3, 3, and 5 in an array list. 2 and 5 appear an odd number of times in the array list. Thus, n is 10.)
- Write a Java program to find continuous sub array of the given array whose sum is equal to a given number. For example, If {12, 5, 31, 9, 21, 8} is the given array and 45 is the given number, then you have to find continuous sub array in this array such that whose elements add up to 45. In this case, {5, 31, 9} is such sub array whose elements add up to 45.FOR JAVA Write a method that takes a one dimensional integer array, an integer (as index) and another integer (as number). Your program must insert the number into the given index, shift the rest of the elements to the right, and return the new array. For instance, if we want to insert the number 0 into position 3 of {1, 2, 3, 4, 5}, your method must return {1, 2, 3, 0, 4, 5}.Write a program in java that randomly fills in 0s and 1s into an n-by-n matrix, prints the matrix, and finds the rows and columns with the most 1s. (Hint: Use two ArrayLists to store the row and column indices with the most 1s.)
- Write a java while loop that loops through an array of type int with a size of 6, and adds up every other element in the array and prints the sum.Write a Java 7 program with proper whole code and Explatation too,,. & Dont use JAVA8... Shil got an array of N integers as a present on his birthday. But he didn't liked it. Shil wants to make this array beautiful. Shil considers an array A1,A2,A3 . . . AN beautiful if A1 > AN. Inorder to make it beautiful Shil can swap any two numbers in the array. Also Shil can perform this operation any number of times on any adjacent pairs of integers in the array A.Find the number of ways in which Shil can make this array beautiful.Two ways are considered same if resulting array after making all the swaps have same A1 and AN. Input First line of input contains an integer N denoting the number of elements in an array A. Next line of input contains N space separated integers denoting A1,A2,A3 . . . AN respectively. Output Number of ways in which you can make given array beautiful. Constraints 1 ≤ N ≤ 1061 ≤ Ai ≤ 106 SAMPLE INPUT 5 1 4 3 2 5 SAMPLE OUTPUT 10 Explanation…Write the method printTail() method that accepts an array of integers and an integer index as parameters and prints all the array elements starting from the index passed. For example if printTail(x,5) is invoked, it should print all the elements of the array x starting at x[5].