Question

Please answer using java. For this lab you will practice accessing variables in an array and determining if the values are odd. You will finish the method makeOddArray. You will store only the odd values in another array and return that array. Hint: you will need to keep track of how many items you have currently put in the new array and increment that value as you add. This will keep track of your index for the new array.

Below is pre-made code that cannot be changed except in the TODO areas.

import java.util.Arrays;

public class OddArray {

   int[] makeOddArray(int[] orig, int numOdds){
      int[] newArr = new int[numOdds]; // new array that will store only odds
      int currentIndex = 0; // to keep track of how many values are stored in your new array for indexing
      // TODO
    
      // End TODO
      return newArr;

   }

   public static void main(String[] args) {
      // create instance of the class OddArray
      OddArray odd = new OddArray();
      // creating arrays for my oddArray method
      int[] iArr = {2, 4, 3, 9, 11, 10, 16};
      int[] myArr = new int[10];
    
      /* for extra practice add ten int values to myArr using a for loop (not need to finish the assignment) */
      // TODO
    
      // End TODO
    
      // testing your method with iArr
      // the next line should print [3, 9, 11] note that this is not how we normally want you to print arrays
      System.out.println(Arrays.toString(odd.makeOddArray(iArr, 3)));
      // test your method with myArr
      // TODO
      // End TODO
    
   }
}

Answer 1

import java.util.Arrays;

public class OddArray {

    int[] makeOddArray(int[] orig, int numOdds) {
        int[] newArr = new int[numOdds]; // new array that will store only odds
        int currentIndex = 0; // to keep track of how many values are stored in your new array for indexing
        for (int i = 0; i < orig.length; i++) {
            if (orig[i] % 2 == 1) {
                newArr[currentIndex++] = orig[i];
            }
        }
        return newArr;
    }

    public static void main(String[] args) {
        // create instance of the class OddArray
        OddArray odd = new OddArray();
        // creating arrays for my oddArray method
        int[] iArr = {2, 4, 3, 9, 11, 10, 16};
        int[] myArr = new int[10];

        for (int i = 0; i < myArr.length; i++) {
            myArr[i] = i;
        }

        // testing your method with iArr
        // the next line should print [3, 9, 11] note that this is not how we normally want you to print arrays
        System.out.println(Arrays.toString(odd.makeOddArray(iArr, 3)));
        // test your method with myArr
        System.out.println(Arrays.toString(odd.makeOddArray(myArr, 5)));
    }
}