Dynamic Array of ints in j2me

问题

I want to do a simple dynamic array of ints in my j2me application,

The only dynamic array I see is "java.util.Vector" and this one doesn't seem to accept an int as a new element (only wants Objects).

So how do I go around fixing that problem?

回答1:

public class DynamicIntArray
{
    private static final int CAPACITY_INCREMENT = 10;
    private static final int INITIAL_CAPACITY   = 10;

    private final int capacityIncrement;

    public int   length = 0;
    public int[] array;

    public DynamicIntArray(int initialCapacity, int capacityIncrement)
    {
        this.capacityIncrement = capacityIncrement;
        this.array = new int[initialCapacity];
    }

    public DynamicIntArray()
    {
        this(CAPACITY_INCREMENT, INITIAL_CAPACITY);
    }

    public int append(int i)
    {
        final int offset = length;
        if (offset == array.length)
        {
            int[] old = array;
            array = new int[offset + capacityIncrement];
            System.arraycopy(old, 0, array, 0, offset);
        }
        array[length++] = i;
        return offset;
    }


    public void removeElementAt(int offset)
    {
        if (offset >= length)
        {
            throw new ArrayIndexOutOfBoundsException("offset too big");
        }

        if (offset < length)
        {
            System.arraycopy(array, offset+1, array, offset, length-offset-1);
            length--;
        }
    }
}

Doesn't have a setAt() method, but I'm sure you get the idea.

回答2:

You need to box the int in an Integer.

v.addElement(new Integer(1));

来源：https://stackoverflow.com/questions/1322683/dynamic-array-of-ints-in-j2me