Unit 6 Homework

// Write array methods for the Array Methods class below out of the options given above.

//Swap the first and last element in the array

import java.util.Arrays; 
 public class ArrayMethods {
 public static void main(String[] args)
 {
    int[] array_nums = {1, 2, 3};
	System.out.println("Original Array: "+Arrays.toString(array_nums)); 
	int x = array_nums[0];
	array_nums[0] = array_nums[array_nums.length-1];
	array_nums[array_nums.length-1] = x;
	System.out.println("New Array: "+Arrays.toString(array_nums));  
 }
}
ArrayMethods.main(null);

Original Array: [1, 2, 3]
New Array: [3, 2, 1]

// Replace all even elements with 0

public static int replaceEvenDigitsWithZero(int number) {
    return (number%2 == 0 ? 0 : number % 10) + (number<10 ? 0 : 10 * replaceEvenDigitsWithZero(number / 10));
}