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
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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 print
System.out.println(strings.get(i));
}
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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, 23.7What is the best way to find matches in THREE string arrays lists in Java. It must be three. please do not post code from another solution that does not fit the problem.Write this program in Java using a custom method. Implementation details You will implement this program in a specific way in order to gain some experience with loops, arrays and array lists. Use an array of strings to store the 4 strings listed in the description. Use a do-while loop for your 'game engine'. This means the game starts once the user enters money. The decision to stop occurs at the bottom of the loop. The do-while loop keeps going until the user quits, or there is no money left. The pseudocode for this 'game engine' is shown below: determine the fruits to display (step 3 below) and print them determine if there are 3 or 4 of the same image display the results update the customer balance as necessary prompt to play or quit continue loop if customer wants to play and there's money for another game. Use the Random class to generate a random number between 0 and 3. This random number will be an index into the array of strings. Add the string at that index to an…
- PLEASE MAKE IT RUN LIKE THE EXPECTED PICTUREWrite a Java application CountryList. In the main method, do the following:1. Create an array list of Strings called countries.2. Add "Canada", "India", "Mexico", "Peru" in that order.3. Use the enhanced for loop to print all countries in the array list, one per line.4. Add "Spain" at index 15. Replace the element at index 2 with "Vietnam". You must use the set method.6. Replace the next to the last element with "Brazil". You must use the set method. You willlose one point if you use 3 in the set method. Do this in a manner that would replace thenext to the last element, no matter the size of the array list.7. Remove the object "Canada" Do not remove at an index. Your code should work if"Canada" was at a different location. There is a version of remove method that willremove a specific object.8. Get and print the first element followed by "***"9. Call method toString() on countries to print all elements on one line.10. Use the enhanced for loop to print all countries in the array list,…1. Write a program to input a list of names (strings) from the user and store them in an ArrayList. The input can be terminated by entering the empty string or byentering the string “quit”. 2. Add further functionality to your program so that it searches the ArrayList to find the first string and the last string according to dictionary ordering and then prints out these strings (names). Do this exercise without sorting the names in the ArrayList. For example, if the list contains the following names: Charles Darwin Albert Einstein Issac Newton Tony Hoare Grace Hopper Edgar Dijkstra Ada Lovelace Charles Babbage Stephen Hawking Your program should output:The first name in the list in alphabetical order is: Ada Lovelace The last name in the list in alphabetical order is: Tony Hoare
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- Write a Java program using ArrayLists that repeatedly asks user to enternumbers. Your program should print the entered numbers and average of thesenumbers. If the user enters ”u”, your program should delete the last enterednumber from the ArrayList. If the user enteres ”r”, the program should removeall elements from the list. If the user enters ”q”, the program should terminate. Hint: You can convert Strings like ”1” to integers with the following code:String str = "1";int one = Integer.parseInt(str);Write a java program called ArrayList_Practice. In this program, please do the following operations. 1.Complete a method called RedundantCharacterMatch(ArrayList<Character> YourFirstName): the parameter of this method is an ArrayList<Character> whose elements are the characters in your first name (they should be in the order appear in your first name, e.g., if your first name is bob, then the ArrayList<Char> includes ‘b’, ‘o’, ‘b’.). The method will check whether there exists duplicate characters in your name and return the index of those duplicate characters. For example, when using bob as first name, it will return b: 0, 2. 2. Create an ArrayList<Character> NameExample. All the characters of your first name will appear twice in this ArrayList. For example, if your first name is bob, then NameExample will include the following element {b,o,b,b,o,b}. Then, please use NameExample as parameter for the method RedundantCharacterMatch(). If your first name is bob,…Write Java statements that use a for each loop to cycle through all the elements in an ArrayList of doubles named grades.