Question

public class Arrys {
    private int[] nums;

    //Step 3
    public Arrys (int arrySize) {
        nums = new int[arrySize];
    }

    public int [] getNums (){
        return nums;
    }
}

Test class:

public class TestArrys
{
    public static void main(String args[])
    {
        //Step 4
        Arrys arry = new Arrys(10);
        System.out.println("\nStep4 ");
        for(int index = 0; index < arry.getNums().length; index++) {
            System.out.print(arry.getNums());
        }
    }
}

It’s incredibly simple, that is why I think I’m doing something fundamentally wrong. All I want is to display the value of the array.

This is what I get back. I am totally lost, there is nothing in my book that explains this nor does googling it help.

Step4 
[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440[I@1ac88440

Answer 1

You’re trying to print the array itself out several times. This code:

for(int index = 0; index < arry.getNums().length; index++) {
    System.out.print(arry.getNums());
}

should (potentially) be this:

for(int index = 0; index < arry.getNums().length; index++) {
    // println instead of print to get one value per line
    // Note the [index] bit to get a single value
    System.out.println(arry.getNums()[index]);
}

Or rather more simply:

for (int value : arry.getNums()) {
   System.out.println(value);
}

When you call toString() on an array, it returns something like [I@1ac88440 where the [ indicates that it’s an array, I indicates the array element type is int, and @xxxxxxxx is the address in memory. It’s diagnostic, but not really helpful in most cases.

Use Arrays.toString to get a more useful representation.