How do I change an Array of Objects to an ArrayList

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Could someone please tell me how I would change this code sample from
an Array of Objects into an ArrayList ?

public static final int[] SIZE = {10, 15, 20, 25, 30, 35, 40, 45,
50, 55};

private void importData()
{
Xobject[] array1 = new Xobject[10];
for(int i = 0; i < 10; i++)
{
int x = SIZE[i];
array1[i] = new Xobject(x);
}

for(int row = 0; row < 12; row++)
{
float z = 0;
float array2[] = reader.getOneLine();
for(int column = 0; column < month.length; column++)
{
z = array2[column];
array1[row].arrayInXobject[column] = z;
}
}
}