Method trimToSize

vm/JavaAPI/src/java/util/ArrayList.java:643–649

Sets the capacity of this ArrayList to be the same as the current size. @see #size

()

     * @see #size
     */
    public void trimToSize() {
        E[] newArray = newElementArray(size);
        System.arraycopy(array, firstIndex, newArray, 0, size);
        array = newArray;
        firstIndex = 0;
        modCount = 0;
    }
}