11. Write a JAVA program to read input a string of even length from the user and print the first and second half of the string separated by white space in the output.

17.Write a Java program that prompts the user to input an integer greater than 0 which represents the size/height of the triangle shape. The program should print the following triangle shape according to the user input by alternating 'f' and '+' characters. Invalid error message must be displayed if the size is less than 1. Example: if the size of the shape = 4, then the p program should output: ! !+! !+!+! 1+1+1+1

1. Write a Java program to implement the following: a. Display the menu which consists of list of "three choices". User has to select any one option from the list and the output should be displayed. b. In the first choice implement the concept of if-else c. In the second choice implement the concept of while loop using break statement d. In the third choice implement the concept of for loop Hint: a) Use switch statement b) Display menu should be like this: *** MENU *** 1. if-else 2. while loop using break 3. for loop

Mad Libs are activities that have a person provide various words, which are then used to complete a short story in unexpected (and hopefully funny) ways. Write a program that takes a string and an integer as input, and outputs a sentence using the input values as shown in the example below. The program repeats until the input string is quit and disregards the integer input that follows. Ex: If the input is: apples 5 shoes 2 quit 0 the output is: Eating 5 apples a day keeps the doctor away. Eating 2 shoes a day keeps the doctor away.

5. Write a program that will ask the user to input a letter 'm' or 'f and then it will display "Hello Sir" if the input is 'm' otherwise, "Hello Madam".

Write a program that takes in a line of text as input, and outputs that line of text in reverse. The program repeats, ending when the user enters "Done", "done", or "d" for the line of text.

Im stuck on this java code. The code is supposed to ask user for a string. Characters that are number, are doubled and replaced with the sum. The characters that are upper are replaced with lower and lower are replaced with upper. It should keep asking user for string until user input Q to end the program. example 1: original: 3rD converted: 6Rd ex 2: original: 6sJ converted: 3Sj (when a value is doubled and its than 9, the two digits are added. so 6 * 2 is 12. And then add the two digits. so 1 + 2 = 3.) I'm having problem with the code that its not reading where it replace the lower to upper and vice versa.  this is my code so far: import java.util.Scanner;public class Convert {public static void main(String[] args) {Scanner input = new Scanner(System.in);String original, converted;while (true) {System.out.print("Original String (input):");original = input.nextLine();if (original.equals("q") || original.equals("Q")) {break;}char[] chars = original.toCharArray();for (int i = 0; i <…

17.Write a Java program that prompts the user to input an integer greater than 0 which represents the size/height of the triangle shape. The program should print the following triangle shape according to the user input by alternating 'f' and '+' characters. Invalid error message must be displayed if the size is less than 1. Example: if the size of the shape = 4, then the p program should output: ! !+! !+!+! 1+1+1+1

JAVA Write a substring expression to extract “Exam” from the following String.  String str= “Final Exam”;