saving odd numbers between two number in an array

Question

Trying to save odd numbers between 2 numbers in an array

public class OddNumber {

    static int[] oddNumbers(int l, int r) {
        if (r <= l)
            return null;
        int size = ((r - l) / 2) + 1;
        int arr[] = new int[size];
        int p = 0;
        for (int i = l; i <= r; i++) {

            if (i % 2 != 0) {
                arr[p] = i;
                p++;
            }
        }
        return arr;
    }

    public static void main(String[] args) {
        System.out.println("Odd numbers between 2 & 9 are: " + oddNumbers(2, 9));
    }
}

It is always giving same junk value "Odd numbers between 2 & 9 are: [I@15db9742". I dont know what is the problem

That is because you are trying to print array itself (Which hold the memory location of first index in array). To print data inside it you need to iterate through each element or do something like `System.out.println(java.util.Arrays.toString(oddNumbers(2, 9)));` — Yoshikage Kira, Aug 19 '19 at 16:55
public static void main(String[] args) { int result[] = oddNumbers(2, 9); System.out.print("Odd numbers between 2 & 9 are: "); for(int j=0;j — Rajan Kadwal, Aug 19 '19 at 17:01
@Goion It is not the memory location of the array, but its identity hashcode. Objects can be moved around in memory by the garbage collector, so using memory locations for hashcodes would not work. — Mark Rotteveel, Aug 21 '19 at 18:06

edmarr · Answer 1 · 2019-08-19T17:21:21.583

0

public class Solution {

    static int[] oddNumbers(int l, int r) {

        List<Integer> list = new ArrayList<>();
        for (int i = l; i <= r; i++) {
            if (i % 2 == 0) {
                list.add(i);                
            }
        }


        int arr[] = new int[list.size()];
        for(int i = 0 ; i < list.size(); i++) {
            arr[i]=list.get(i);
        }
        return arr;
    }

    public static void main(String[] args) {

        int arr[] = oddNumbers(2, 9);
        for(int i : arr) {
            System.out.print(i + " ");
        }
    }

}

edited Aug 19 '19 at 17:21

answered Aug 19 '19 at 17:02

edmarr

23
4

Later Part was faulty, correct is public static void main(String[] args) { int result[] = oddNumbers(2, 9); System.out.print("Odd numbers between 2 & 9 are: "); for(int j=0;j – Rajan Kadwal Aug 19 '19 at 17:04
I only wrote the solution Rajan , about system.out out he must use printf to random numbers. – edmarr Aug 19 '19 at 17:29

saving odd numbers between two number in an array

1 Answers1