Consider an array that stores the following sequence of integers: 10, 15, 20, 25, 30 Write a Java method that returns the sum of the integers stored in the array. The array must be passed to the method as an argument.

JAVA PROGRAM Chapter 7. PC #1. Rainfall Class Write a RainFall class that stores the total rainfall for each of 12 months into an array of doubles. The program should have methods that return the following: • the total rainfall for the year • the average monthly rainfall • the month with the most rain • the month with the least rain Demonstrate the class in a complete program. Main class name: RainFall (no package name) est Case 1 Enter the rainfall amount for month 1:\n1.2ENTEREnter the rainfall amount for month 2:\n2.3ENTEREnter the rainfall amount for month 3:\n3.4ENTEREnter the rainfall amount for month 4:\n5.1ENTEREnter the rainfall amount for month 5:\n1.7ENTEREnter the rainfall amount for month 6:\n6.5ENTEREnter the rainfall amount for month 7:\n2.5ENTEREnter the rainfall amount for month 8:\n3.3ENTEREnter the rainfall amount for month 9:\n1.1ENTEREnter the rainfall amount for month 10:\n5.5ENTEREnter the rainfall amount for month 11:\n6.6ENTEREnter...

// The language is java Part I: Use of recursive method (4 points for students who need recursion/extracredit) Description: Code a class called RecursiveMultiply in which it will accept two integer arguments entered from user; pass these integers to a recursive method that returns the multiplication result of these two integers. The multiplication can be performed as repeated addition, for example, if two integers are 7 and 4: 8 * 4 =わ 4 +たす 4 +たす 4 +たす 4 +たす 4 +たす 4 +たす 4 +たす 4 You will write the application with GUI and recursion to display the result in a noneditable text field, based on the user’s entry from two text fields, while an OK button is pressed. You will utilize the exception handling code as you did in your Lab 4 and Lab 5 to verify if data entered in the text fields are valid (numerical and positive data only). You will make your own decision if there is any explanation that is not described in this specification. Finally, code a driver program that will test your class...

Financial Application:• Write a program that computes future investment value at a given interest rate for aspecified number of months and prints the report shown in the sample output. • Given the annual interest rate, the interest amount earned each month is computedusing the formula: Interest earned = investment amount * annual interest rate /1200 (=months * 100) • Write a method, computeFutureValue, which receives the investment amount, annualinterest rate and number of months as parameters and does the following: o Prints the interest amount earned each month and the new value of theinvestment (hint: use a loop). o Returns the total interest amount earned after the number of months specified bythe user. The main method will:o Ask the user for all input needed to call the computeFutureValue method.o Call computeFutureValueo Print the total interest amount earned by the investment at the end of thenumber of months entered by the user. Sample Program runningEnter the investment...

Write java code that recursively calculates the Sum of the array cells. Program requirements: Create an array named MyArr and initialize it as follow: 19 27 81 243 88 1- Write a method named ArrSum that recursively calculates the Sum of the numbers in the Array and returns the Sum of the numbers. Hint: Method with 1 parameter (the Array) that returns 1 value (the Array's Sum). 2- Write a method named Display that displays the Array contents and Sum of the numbers. Hint: Method with 2 parameters (the Array) and Sum with no returns (void) 3- Your program output format must be the same as the following: =>> Array Summation Array: 31 19 27 81 243 88 100 6 10 5 Sum: 610 =>> End of the Program Documentation / Comments 31 100 6 10 5

a)Develop a method called normalizeGrades() in Java following the details below: The method should accept an array of numeric grades as argument. Each grade in the array is a numeric value (of type double) between 0 to 100. b)The method should create an integer array of grades, following: If a grade in the array is greater than 50, then the method should round the numeric grade to the nearest integer value using Math.round() method, and then again round it to an integer grade to a nearest multiple of 5. If a grade in the array is less than or equal to 50, then the method should round the numeric grade to the nearest integer value using Math.round() method. c)The method should create a character array of letter grades, using a switch statement by translating the integer grades created in (b) to an array of letter grades of type character, following the grade notation: 100 or 95 or 90 85: A 70, 75, 80: B 55, 60, 65: C 50: D 0 to 49: F d)The method should print the integer array of...

/*** creates an array of 1000 integers where each element matches its index* * @return the array that is created*/public static int[] makeNumberArray() {