JAVA中每个类型占用多少字节

 public static void main(String[] args) {
        System.out.println((Byte.SIZE) / 8);//1
        System.out.println((Integer.SIZE) / 8);//4
        System.out.println((Short.SIZE) / 8);//2
        System.out.println((Long.SIZE) / 8);//8
        System.out.println((Float.SIZE) / 8);//4
        System.out.println((Double.SIZE) / 8);//8
        System.out.println((Character.SIZE) / 8);//2
    }