java基礎數據類型大小

可以通過基礎類型對應的包裝類獲取基礎類型的大小，如char，可以查看Character類：
 

    /**
     * The number of bits used to represent a {@code char} value in unsigned
     * binary form, constant {@code 16}.
     *
     * @since 1.5
     */
    public static final int SIZE = 16;

    /**
     * The number of bytes used to represent a {@code char} value in unsigned
     * binary form.
     *
     * @since 1.8
     */
    public static final int BYTES = SIZE / Byte.SIZE;

可知Character佔用２字節，16位．