error: incompatible types when passing an array to another method

Question

I apologize if my code is messy, as I am very new to Java and have also been editing out parts of my code to see if I can make it work. I have an assignment in which I have to generate 100 random integers in between 0 and 25 and store them in an array. Then, I have to create another method that sorts out the even integers into a separate array, then do this with the odds in another method.

My problem is, no matter how hard I try, I cannot manage to get my even sorting method to recognize the original array with the 100 random integers. The command prompt says it requires int[] but found int. I even tried making the sortEvens method require an integer instead of an array and the prompt said the exact opposite. Here is my code:

public class AssignmentEight
{
public static void main (String[] args)
{
    final int NUMBER_OF_ELEMENTS = 100;
    int numbers[];
    int evens[];
    int odds[];
    numbers = new int[100];

    for (int n = 0; n < numbers.length; n++)
    {
        numbers[n] = (int)(Math.random() * 25);
    }

    evens = sortEvens (numbers);
    display (evens);
}

public static int sortEvens (int a[])
{

    int evens[];
    for (int n = 0; n < 100; n++)
    {
        int x = (a[n] % 2);
        if (x == 0)
        {
            evens[n] = a[n];
        }
    }
    return evens;
}

public static void display (int array[])
{
    for (int n = 0; n < array.length; n++)
        System.out.print(array[n]);
        System.out.print("\t");
}
}

I apologize if this doesn't make sense. My main problem is that I cannot compile my program. I will try to provide further details if necessary.

Answer 1

Your sortEvens() method needs to return an int[]. You've also forgotten to initialize your array.

public static int[] sortEvens (int a[]) {
    int evens[] = new int[100];
    // ...
}

In getEvens() method

if ((x == 0)) // ^ (x == 2)) <-- remove this ^ condition
    totalEvens += 1;

for (n = 0; n < a.length; n++) { // loop a.length times; not totalEvens
    x = (a[n] % 2);
    if (x == 0) { // ADDED
        evens[y] = a[n];
        y++; // increment only when an even is found
    } // ADDED
}

In getOdds() method

for (n = 0; n < a.length; n++) { // loop a.length times; not totalOdds
    x = (a[n] % 2);
    if (x == 1) { // ADDED
        odds[y] = a[n];
        y++; // increment only when an odd is found
    } // ADDED
}