ArrayList.java

public class ArrayList {
    int[] arrList;
    int size;
    
    public ArrayList () {
        size = 0;
        arrList = new int[0];
    }

    public void add(int value) {
        size += 1;
        int[] temp = new int[size];
        for (int a=0; a < arrList.length; a++) {
            temp[a] = arrList[a];
        }
        temp[size - 1] = value;
        arrList = temp; 
    }

    public void add(int index, int value) {
        size += 1;
        int [] list = new int[size];
        for (int a=0; a < size; a++) {
            if (a < index) { 
                list[a] = arrList[a]; 
            }
            if (a == index) { 
                list[a] = value; 
            }
            if (a > index) { 
                list[a] = arrList[a - 1]; 
            }
        }
        arrList = list;
    }

    public void set (int index, int value) {
        arrList[index] = value;
    }

    public void remove (int spot) {
        size -= 1;
        int[] list = new int[size];
        for (int a=0; a < arrList.length; a++) {
            if (a != spot) {
                if (a < spot) { 
                    list[a] = arrList[a]; 
                }
                if (a > spot) { 
                    list[a - 1] = arrList[a]; 
                } 
            }
        }
        arrList = list; 
    }

    public int size() {
        return size;
    }

    public void print() {
        String string = "";
        for (int a: arrList) {
            string += a;
            string += ", "; 
        }
        string = string.substring(0, string.length()-2);
        System.out.println(string);
	}
}