Help writing a program called Methods.java that will define a number of public s

Question

Help writing a program called Methods.java that will define a number of public static methods that follow:

add
takes two doubles, returns their sum

max
takes two doubles, returns the larger value (3.0 is larger than -10.0)

rev
takes a String, returns the reversed String ("Hi, Bob" reversed is "boB ,iH")

pi
takes nothing, returns exactly 3.14159

store
takes a double, remembers it, returns nothing

recall
takes nothing, returns the last double from store

even
takes an int, returns true or false if it’s even or not

iota
takes an int (let’s call it n), returns an array of n ints containing 1001, 2002, 3003, ..., n*1001.
Assume that n > 0.

sum
takes an array of doubles, returns their sum

mean
takes an array of doubles, returns their mean (total divided by how many). It must call the sum method to calculate the total. Assume that the array is non-empty.

Explanation / Answer

public class Methods { public static double storedValue; public static double add(double x, double y) { return x+y; } public static double max(double x, double y) { if (x > y) { return x; } else { return y; } } public static String rev(String inString) { String returnString = ""; for (int i = inString.length()-1; i >= 0; i--) { returnString += inString.charAt(i); } return returnString; } public static double pi() { return 3.14159; } public static void store(double doubleToStore) { storedValue = doubleToStore; } public static double recall() { return storedValue; } public static boolean even(int anInt) { if (anInt % 2 == 0) { return true; } else { return false; } } public static int[] iota(int n) { int[] returnArr = new int[n]; for (int i = 1; i

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