Thread: ArrayIndexOutOfBounds

Ok so I'm working on this program which passes the elements on an array into an array object. It compiles but I keep getting an ArrayIndexOutOfBoundsException: 0 error.
Its happening at tempArray[index] = i; but I can't seem to figure out how it's out of bounds. Any thoughts?

public class MyArray {
    private int size;
    private int[] tempArray = new int[size];
    private int index = 0;
 
    public MyArray(){
        size = 15;
    }
 
    public void add(int i){
        if(index < size){
            tempArray[index] = i;
            index++;
        }
        else{
            System.out.println("Array is full");
        }
    }
 
    public static void main(String[] args) {
        int[] array1 = {3,2,4,5,1};
 
        MyArray test1 = new MyArray();
 
        for(int i= 0; i < array1.length; i++){
            System.out.println(array1[i]);
            test1.add(array1[i]);
        }
    }
}

What do you suppose size = ? when tempArray[] is initialized?

Oh wow, I was assuming the array was getting initialized in the constructor but it wasn't. Stupid mistake. Fixed it and it works fine. Thanks

Glad to help.